CASES

Electromagnetic Flowmeters (EMF), a type of advanced flow measurement instrument that rose to prominence in the 1950s-1960s alongside the development of electronic technology, have evolved into a diverse range of products to meet varied industrial needs. Recently, our company has successfully completed the production of 158 customized electromagnetic flowmeters for a German client, which are now ready for packaging and shipment. This batch of flowmeters, tailored to the client's specific requirements, covers multiple types designed for different application scenarios, showcasing our strength in providing professional flow measurement solutions. Electromagnetic flowmeters are categorized into various types based on their uses, each serving distinct industrial fields. The general-purpose type, the mainstay of our product line, is widely applied in industries such as metallurgy, petrochemicals, papermaking, textiles, water supply and drainage, sewage treatment, pharmaceuticals, food processing, biotechnology, and fine chemicals. It operates within a specific range of medium conductivity, ensuring accurate measurement for general industrial flows. For hazardous environments, our explosion-proof electromagnetic flowmeters are the ideal choice. Currently, most are of the flameproof type, while intrinsically safe (safety spark) models with reduced excitation power have also been developed, suitable for integral installation in dangerous areas. This batch for the German client includes explosion-proof units, catering to potential safety-critical operations in their industrial setup. In industries with strict hygiene standards like pharmaceuticals, food, and biochemistry, our sanitary electromagnetic flowmeters stand out. They meet relevant hygiene requirements, featuring easy disassembly for cleaning and compatibility with regular sterilization processes, ensuring compliance with stringent production norms. Additionally, our product range includes submersible-proof flowmeters for underground installations, capable of withstanding short-term water immersion; submersible types for open channels or non-full closed channels, designed for long-term underwater operation; and insertion-type flowmeters for large-diameter pipelines, offering a cost-effective solution for flow control systems despite their lower accuracy. This successful cooperation with the German client not only demonstrates the reliability and versatility of our electromagnetic flowmeters but also reflects our ability to meet customized demands from global customers. Whether for general industrial use, hazardous environments, hygiene-sensitive fields, or special installation conditions, we can provide tailored flow measurement solutions. If you are in need of electromagnetic flowmeters for any application, please feel free to contact us. Contact Information Website: https://www.radar-leveltransmitter.com/ Email: 2851571250@qq.com Phone: 15901050329

In the field of industrial automation and precision measurement, the "size" and "performance" of equipment are often a focus of trade-offs. Compact pressure transmitters, with their unique advantages, are becoming the ideal choice for space-constrained scenarios and high-precision measurement needs. This article combines practical application cases to deeply analyze their core advantages, selection points, and typical scenarios, providing practical references for industry users.​ I. Small Size, Unleashing Multiple Usage Values​ The core competitiveness of compact pressure transmitters first lies in their "small but refined" design concept.​ Spatial adaptability is a notable highlight. For scenarios such as chemical production lines with dense pipelines and small internal cavities of equipment, their compact size can be flexibly embedded. Combined with multiple installation methods such as threads and flanges, the space occupation cost is significantly reduced. In the hydraulic system transformation of an auto parts factory, after adopting this type of transmitter, the equipment integration degree increased by 40%, and the maintenance channel space was retained.​ Measurement performance is also excellent. Products equipped with high-precision sensors can accurately capture parameters such as absolute pressure, gauge pressure, and differential pressure, and have outstanding anti-interference capabilities against environmental temperature fluctuations and mechanical vibrations. In the pressure monitoring of reaction kettles in the pharmaceutical industry, the long-term measurement error is controlled within ±0.1%FS, meeting the strict requirements of GMP for process stability.​ The wide range of applications further expands its application boundaries. It can stably measure corrosive liquids (such as acid-base solutions), high-temperature steam, and clean gases (such as medical oxygen), with a measuring range covering the entire interval from negative pressure to high pressure. At the same time, the output of standard 4-20mA current signals or RS485 digital signals enables it to easily interface with PLC and DCS systems, realizing remote monitoring and automatic adjustment.​ The enhancement of protective capabilities ensures reliability in complex environments. Some models have passed IP65/IP68 protection certifications and can operate stably for a long time in humid sewage treatment plants, dusty cement plants, and even coastal high-salt-fog environments, reducing maintenance frequency.​ II. Scientific Selection, Matching Scene Requirements​ The accuracy of the selection process directly determines the performance of the equipment. Users need to focus on the following dimensions:​ Adaptation to medium and environment is the prerequisite. When measuring corrosive media, materials such as 316L stainless steel or Hastelloy should be selected; for high-temperature environments (such as steam pipelines), high-temperature-resistant models should be matched; for sanitary scenarios (such as food filling lines), the design of sanitary interfaces such as 3A certification should be confirmed.​ The selection of range and accuracy should be in line with reality. It is recommended to set the upper limit of the range according to 80% of the measured value (reserving about 20% margin to deal with peaks). The accuracy level is selected according to the scenario: 0.5 level can be used for industrial process control, and 0.1 level high-precision models can be used for laboratory measurement.​ The compatibility of signals and installation cannot be ignored. When the backend control system is PLC, 4-20mA current signals are preferred for anti-interference; RS485 digital signals are recommended for long-distance transmission scenarios. The installation method should match the on-site pipeline specifications. For example, G1/2 threads are suitable for small-diameter pipelines, and flange connections are suitable for large-diameter or high-pressure occasions.​ III. Scene Implementation, Witnessing Technical Strength​ In practical applications in various industries, compact pressure transmitters have performed admirably:​ In HVAC systems, their low-power design and small size perfectly adapt to the pressure monitoring of fan coils in air conditioning units, helping with building energy-saving transformations; in the medical equipment field, biocompatible materials and high-precision measurement meet the liquid pressure control needs of hemodialysis machines; in mobile hydraulic equipment (such as construction machinery), anti-vibration and anti-shock designs ensure real-time pressure feedback of hydraulic systems; in clean workshops of the food and pharmaceutical industry, sanitary interfaces and anti-corrosion performance ensure the safe measurement of media such as sauces and medicinal liquids.​ As the "nerve endings" of industrial measurement, compact pressure transmitters carry the responsibility of precise measurement and stable operation with their small size. Through scientific selection and scene adaptation, they are becoming a key link in automation upgrades, injecting "invisible power" into efficient production and safety control in various industries.​ For more model parameters or customized solutions, you can visit professional platforms to obtain detailed technical data and let the exquisite design empower your production efficiency.

Key Factors to Consider for Selection​ 1. Medium Characteristics​ Fluid Type: Clearly identify whether it is gas, liquid, or steam. Different types of fluids have varying adaptabilities to flow meters. For example, Verabar and Delta Bar are more accurate in measuring gases and steam. For liquids, their viscosity and corrosiveness need to be considered. For low-viscosity liquids (≤10 cP), Verabar can be selected; for corrosive liquids, Delta Bar can better adapt due to its special material and structure.​ Temperature and Pressure: Understand the operating temperature and pressure range of the fluid. If the temperature is as high as 650℃ and the pressure is ≤32MPa, the enhanced Pitot Bar can meet the requirements; for extreme temperatures ranging from -200℃ to 1240℃ and high pressures up to 68MPa, Delta Bar is a suitable choice.​ 2. Accuracy Requirements​ If extremely high accuracy is required, such as in trade settlement scenarios, Annubar has high accuracy under suitable working conditions but comes with high maintenance costs. If the accuracy requirement is around ±5% - 10% and cost-effectiveness is pursued, in low-flow rate scenarios, the enhanced Pitot Bar combined with AI compensation can meet the needs.​ 3. Turndown Ratio Requirements​ When the flow range fluctuates greatly and a larger turndown ratio is needed, Delta Bar's 30:1 turndown ratio and the enhanced Pitot Bar's 50:1 turndown ratio have more advantages. For situations where the flow range is relatively stable and the turndown ratio requirement is not high, such as 5:1 or 10:1, T-type Bar and Verabar can also meet the usage needs.​ 4. Pipeline Conditions​ Pipe Diameter: Large-diameter pipelines (above DN300) are the advantageous field of bar-type flow meters, and different types are applicable to different pipe diameters. For example, Verabar is applicable to pipe diameters of DN38 - 9000mm; for ultra-large diameters (above DN9000mm), Delta Bar has corresponding models (such as H150 type).​ Pipeline Shape: Some bar-type flow meters support circular, square, or rectangular pipelines. For example, Verabar supports circular and square pipes; Annubar is suitable for square/rectangular pipelines.​ 5. Convenience of Installation and Maintenance​ Installation Space and Method: Some models support online plugging, such as Delta Bar's H350 type, which is suitable for non-stop maintenance scenarios. For situations with limited installation space, models with a compact structure need to be selected.​ Maintenance Frequency and Difficulty: Annubar requires regular cleaning of pressure taps, with moderate maintenance difficulty; the enhanced Pitot Bar has a higher maintenance frequency, requiring cleaning of pressure taps every 6 months; Verabar has an excellent anti-clogging design, making maintenance relatively simple.​ 6. Cost Budget​ The price of bar-type flow meters varies depending on the type and pipe diameter. Taking DN800 as an example, the price of the enhanced Pitot Bar is about 40,000 - 80,000 yuan, with outstanding cost-effectiveness; Annubar is about 120,000 - 180,000 yuan, with a relatively high price. When selecting, it is necessary to combine the enterprise's budget, comprehensively consider performance and price, and choose the most cost-effective product.​ Selection Suggestions for Different Application Scenarios​ 1. Ultra-Low Flow Rate Scenarios (

Project Background A large - scale chemical plant is mainly engaged in the production and storage of various chemical raw materials. In its production process, it involves a variety of corrosive liquids, high - viscosity media, and slurries containing particles. It has extremely high requirements for the accuracy, stability, and safety of liquid level measurement. Previously, the traditional liquid level measurement equipment used in the plant often had large measurement errors and frequent maintenance due to problems such as medium corrosion and scaling, which seriously affected production efficiency and safe production. In order to solve this problem, after multiple investigations, the plant finally chose to cooperate with our company (Nuoying Jiaye) and introduced a variety of high - performance radar level meters and related supporting equipment. Selected Products and Reasons According to the working conditions and measurement needs of the chemical plant, we recommended and provided the following products for it: NYRD - 805 Non Contact Level Transmitter: Made of PTFE material, it has good corrosion resistance, with a measuring range of 0 - 10m, suitable for non - contact liquid level measurement of various corrosive liquids. Its non - contact measurement feature can avoid direct contact with corrosive media and reduce the risk of equipment damage. 26GHz Radar Level Transmitter (2 Wire And 4 Wire): It has two power supply modes: 2 - wire and 4 - wire, which can adapt to different on - site power supply conditions. It can accurately measure the liquid level of various media and has played an important role in the measurement of multiple storage tanks in the chemical plant. IP67 GWR Radar Level Transmitter 316L Stainless Steel: Made of 316L stainless steel, with a protection level of IP67, it is suitable for relatively harsh working conditions, especially in occasions with dust and humidity. It can accurately measure high - viscosity media and slurries containing particles. Construction Process Preliminary Survey and Scheme Design: Our technical personnel went to the chemical plant in advance to conduct a detailed survey on the location, size, medium characteristics, and working environment of each storage tank. Based on the survey results and combined with the plant's production process and measurement requirements, a personalized liquid level measurement scheme was formulated, determining the installation position, installation method of each radar level meter, as well as the relevant wiring and commissioning plans. Equipment Installation: For corrosive liquid storage tanks, we chose to install the NYRD - 805 Non Contact Level Transmitter at a suitable position on the top of the storage tank, using a bracket fixing method to ensure that the sensor keeps a safe distance from the medium and avoid contamination of the equipment by medium splashing. For storage tanks containing high - viscosity media and slurries with particles, the IP67 GWR Radar Level Transmitter 316L Stainless Steel was installed using a flange connection method to ensure the equipment is firmly installed and facilitate later maintenance. The 26GHz Radar Level Transmitter was installed in 2 - wire and 4 - wire modes according to the on - site power supply conditions, and wiring was carried out in strict accordance with electrical installation specifications to ensure correct and safe line connection. Commissioning and Calibration: After the equipment installation is completed, the technical personnel carefully debugged each radar level meter. By setting appropriate parameters such as measurement range and output signal, the equipment can accurately reflect the liquid level change. At the same time, multiple calibration tests were conducted to compare the measurement results with the actual liquid level, and the equipment performance was continuously optimized until the measurement error was controlled within the allowable range. Operation Effect High Measurement Accuracy: After being put into operation, each radar level meter can accurately measure the liquid level of different media with small measurement errors, meeting the chemical plant's requirements for liquid level measurement accuracy and providing reliable data support for the precise control of the production process. Good Stability: During long - term operation, the equipment has shown good stability, not affected by factors such as changes in the physical properties of the medium, temperature fluctuations, and dust, reducing production fluctuations caused by unstable measurement. Low Maintenance Cost: Due to the corrosion resistance and anti - scaling characteristics of the selected radar level meters, the incidence of equipment damage and failures is reduced, and the maintenance frequency and cost are lowered. At the same time, the intelligent function of the equipment facilitates remote monitoring and fault diagnosis, further improving maintenance efficiency. Improved Safety: Accurate liquid level measurement avoids safety hazards such as overflow due to too high liquid level or idling due to too low liquid level, providing a strong guarantee for the safe production of the chemical plant. Customer Evaluation The person in charge of the chemical plant said: "Nuoying Jiaye's radar level meter products have excellent performance, and the construction team is professional and efficient, perfectly solving the long - standing problem of liquid level measurement in our plant. The equipment operates stably and reliably, which not only improves production efficiency but also greatly reduces safety risks. It is a very successful cooperation. We are very satisfied with Nuoying Jiaye's products and services and will continue to maintain cooperative relations in the future." Through this cooperation with the chemical plant, the excellent performance and reliable performance of our radar level meters in complex working conditions of the chemical industry have been fully demonstrated. We will continue to uphold the concept of "focusing on the research, development, production, sales of industrial automation instruments and providing Internet of Things solutions" to provide high - quality products and professional services for more industry customers.

Interface measurement: Guided wave radar can measure the Interface, such as the oil-water interface, the interface between liquid and slurry, etc. This function is very important in petrochemical, chemical and other industries, especially in multiphase liquid systems to measure the height of the boundary between different media. The following details explain its principle, implementation mode and working condition requirements.     1. Basic principle of interface measurement   Guided wave radar measurement interface is based on dielectric constant difference and electromagnetic wave reflection principle. 1. Electromagnetic wave reflection mechanism: • The electromagnetic wave emitted by the guided wave radar will partially reflect when it encounters different media. The strength of this reflection depends on the difference in permittivity between adjacent media. • A medium with a high dielectric constant reflects a stronger signal. For example, the dielectric constant of water (≈80) is much higher than that of oil (≈2~4), so the reflected signal is very obvious at the oil-water interface. 2. Signal distribution: • Electromagnetic waves first encounter the liquid surface (for example, the top of the oil layer), where the first reflection occurs. • The remaining electromagnetic wave continues to propagate until it reaches the oil-water interface, producing a second reflection. • After receiving the two reflected signals, the instrument calculates the liquid level height and the interface height respectively through the time difference and signal strength. 3. Dual interface measurement: • For oil-water mixtures, the guided wave radar can simultaneously measure the oil level position at the top and the oil-water interface height at the bottom.   2. Method of interface measurement   2.1 Signal Processing   Guided wave radar uses a special signal analysis algorithm to achieve interface measurement: • Signal strength analysis: • Distinguish the top liquid level from the bottom interface by analyzing the strength of the reflected signal. A medium with a high dielectric constant (such as water) reflects a stronger signal, while a medium with a low dielectric constant (such as oil) has a weaker signal. • Time difference calculation: • The instrument records the time of each reflected signal and, combined with the known wave velocity, calculates the position of the top liquid level and interface respectively.   2.2 Multiple Calibration   In actual conditions, the interface measurement requires factory calibration or field calibration of the guided wave radar: • Factory calibration: Manufacturers pre-set parameters according to the permittivity of common media. • On-site calibration: The user sets and optimizes the instrument according to the specific medium, such as entering the dielectric constant value of different media.   3. Working condition requirements of interface measurement   3.1 Medium Requirements   1. Dielectric constant difference: • The accuracy of the interface measurement is directly related to the dielectric constant difference. The greater the dielectric constant difference, the stronger the interface reflected signal and the more reliable the measurement. • Examples of typical media differences: • Water and oil: large differences, easy to measure. • Alcohol vs. oil: The difference is smaller and may require a more sensitive instrument. 2. Uniformity: • The measured medium should be as uniform as possible, for example, the oil-water interface should be clear. If the medium has a large fluctuation or mixing zone (emulsion layer), it may lead to measurement errors.   3.2 Environment Requirements   1. Stirring and fluctuation: • If the interface fluctuates violently (such as violently stirring or tossing), the reflected signal may be unstable. • It is recommended to measure under static or more stable conditions. 2. Temperature and pressure: • Guided wave radar can generally adapt to high temperature and pressure, but it is necessary to ensure that the rod material can withstand the actual working conditions. • Large temperature gradients may have a slight effect on signal propagation speed, but the instrument can be corrected by compensation. 3. Container shape and obstacles: • The probe rod should avoid stirrers, escalators or other structural obstacles to avoid interfering with signal propagation.   3.3 Dielectric constant input   • Interface measurement requires the permittivity of both media to be entered in advance. • If the permittivity of the two media is too close (e.g., the difference is less than 5), the guided wave radar may have difficulty accurately distinguishing the interface.   4. Advantages and limitations of interface measurement   advantage   1. Non-contact measurement (through the probe rod) : no direct contact with the interface, strong durability. 2. Accurately distinguish the interface: it can measure the top liquid level and the interface position at the same time, providing comprehensive information of multi-layer liquid. 3.Resistant to complex conditions: suitable for high temperature, high pressure, corrosive media environment. 4. Easy integration: Compatible with industrial automation systems, remote data monitoring can be achieved.   limitation   1. Strong dependence on dielectric constant difference: the interface with small dielectric constant difference is difficult to measure. 2. Impact of emulsion layer: • If there is an emulsifying layer between the two media (such as an oil-water mixture), the reflected signal may be dispersed and the height of the interface can be measured inaccurately. 3. Interference signals: stirrers or other devices may cause pseudo-reflected signals. 4. Calibration complexity: It is necessary to accurately understand the characteristics of the measured medium in order to carry out effective calibration. 5. Typical application scenarios   1. Oil-water separator: used to measure the height of the oil level and the position of the oil-water interface to ensure the purity of the oil. 2. Chemical reaction tank: monitoring the stratification state of different liquids during the reaction process. 3. Sewage treatment: Measure the height of the clean water layer and the sludge interface to optimize the process operation. 4. Tank level management: Accurate measurement of each liquid layer in the mixed liquid tank.   Sum up   Guided wave radar can accurately measure the interface height of liquid by detecting the reflected signals of different media. The key lies in the difference of dielectric constant and signal processing technology. Although it has certain requirements for working conditions and medium characteristics, its high accuracy and wide applicability make it the preferred tool for multiphase liquid interface measurement.                                                                                                                                             Thank you 

Guided wave radar is a kind of instrument that uses electromagnetic wave to measure liquid level and material level, which is often used to measure the position of liquid, slurry or solid particles in industrial environment. It has the characteristics of high precision, durability and adaptability to a variety of working conditions. The following is a detailed explanation from the basic principle, working process, applicable conditions, advantages and disadvantages.    1. How it works Guided wave radar is based on Time Domain Reflectometry (TDR), which transmits and reflects electromagnetic waves to measure the position of the medium. • Core components: • Sounding rod or cable: the carrier that guides the propagation of electromagnetic waves. • Transmitter: emits low-energy, high-frequency electromagnetic waves (usually microwaves). • Receiving device: receiving the electromagnetic wave signal reflected back. • Electronic unit: processing and analyzing signals and output measurement results. • Measurement process: 1. The instrument emits electromagnetic waves through the probe rod or cable. 2. Electromagnetic waves propagate along the probe rod or cable, and when encountering the measured medium (such as liquid or solid particles), some electromagnetic waves will be reflected back because the dielectric constant of the medium is different from that of air. 3. The instrument records the time it takes for electromagnetic waves to be emitted and reflected back (time of flight). 4. According to the propagation speed of the electromagnetic wave in the probe rod (known), calculate the distance of the wave from the probe to the surface of the medium. 5. Combined with the length of the probe rod and the size of the container, calculate the liquid level or material level.       2. Operating conditions   Guided wave radar is widely used in industrial fields, suitable for a variety of complex conditions, as follows:   2.1 Liquid Measurement   • Clean liquids such as water, solvents, oils. • Viscous liquid: such as petroleum, resin, slurry, etc.   2.2 Measurement of solid particles   • Low density solids: such as plastic particles, powders. • High density solids: such as sand, cement, grain, etc.   2.3 Complex Operating Conditions   • High temperature and high pressure: Guided wave radar can withstand extreme temperatures (such as up to 400 ° C) and high pressure environments. • Volatile or foam surfaces: Foam or volatile liquid surfaces can interfere with other measurement methods, but guided wave radars can usually cope. • Corrosive media: Through the selection of corrosion-resistant materials (such as teflon coated probe rod), it can be used in corrosive environments such as acid and alkali.     3. Advantages and disadvantages   3.1 Advantages   1. High precision: The measurement accuracy is usually up to ±2 mm, which is very suitable for process control requiring high accuracy. 2. Not affected by working conditions: • Not affected by changes in temperature, pressure, density, viscosity and other medium properties. • Penetrable to dust, steam or foam. 3. Wide range of application: almost all liquids and most solids can be measured. 4. Maintenance-free: no moving parts, small wear, long service life. 5. Flexible installation: It can be installed on the top of the container and measured by the probe rod or probe cable.   3.2 Disadvantages   1. High installation requirements: • The probe rod or cable should be kept at a certain distance from the vessel wall to avoid interference. • There are requirements for the length of the probe rod, and the applicable measurement range is limited (usually within tens of meters). 2. Depends on the installation environment: • If there are stirrers or obstructions in the container, it may interfere with the signal. • For some very low dielectric constant media (such as some oil products), the reflected signal is weak, affecting the measurement. 3. High cost: Compared with other traditional level gauges (such as float type, pressure type), the initial cost is higher. 4. High signal processing requirements: under complex conditions, advanced signal processing technology may be required to distinguish multiple reflections.     4. Summarize the example   Suppose you have a bucket filled with water, you take a probe pole (guided wave radar), let a beam of electromagnetic waves propagate along the probe pole towards the surface of the water, when the electromagnetic wave reaches the surface, due to the different dielectric constants of water and air, part of the wave is reflected back. The radar equipment measures the back and forth time of the beam and can calculate the distance from the surface of the water to the starting point of the probe rod, thus knowing the height of the water.   Compared to the traditional "measuring the depth of the bucket with a ruler" method, the guided wave radar is not only fast and accurate, but also can work in harsh environments, such as the water in the bucket is high temperature or stirred. Through this method, guided wave radar can accurately measure liquid level or material level under complex conditions, which is suitable for various industrial applications. However, it is necessary to pay attention to the installation environment and measurement conditions in use to exert its best performance.                                                                                                                                Thank you     

The magnetic flap level gauge is a liquid level measuring device based on the principle of buoyancy and magnetic coupling.   Working principle 1. Buoyancy effect The core component of a magnetic flap level gauge is a float enclosed in a measuring tube. When the liquid level rises or falls, the float moves with it. 2. Magnetic coupling transmission The float contains a permanent magnet, and the movement of the float drives the magnetic flip plate on the external display panel to flip, usually red or white to indicate the liquid and gas areas respectively, thus indicating the liquid level. 3. Signal output • The measuring tube side can be equipped with reed tube or magnetostrictive sensor for detecting the position signal of the maglev. • The electronic module converts the level change into a standard analog signal (e.g., 4 ~ 20mA) or a digital signal for transmission to the remote monitoring system.   Limitation 1. Applicable media The magnetic flap level meter is mainly suitable for liquids with a density greater than the float density. If the density of the liquid is too low or close to the density of the float, the insufficient buoyancy causes the measurement to be inaccurate. 2. Temperature and pressure limitations • High temperature will affect the magnetism of the magnet, will fail after a certain temperature, need to choose high temperature resistant materials. • The high-pressure vessel must be designed to withstand pressure; otherwise, the pipe or float will be deformed. 3. Viscous and crystalline substances The viscous liquid will increase the friction of the float and affect the movement flexibility. A medium that is easily crystallized or with suspended matter may trap the float.   Installation method 1. Install it vertically Ensure that the measuring tube is vertical when installed. Deviation will block the float and cause measurement errors. 2. Media inlet and outlet The inlet pipe mouth should not directly impact the float, so as to avoid strong impact on the float, affecting the life and measurement accuracy. 3. Clean and protect Check and clean the measuring tube before installation to prevent welding slag or debris from affecting float movement. For corrosive media, anticorrosive materials should be selected. 4. Install in bypass mode The magnetic flap level gauge is usually installed on the side of the storage tank or container in the form of a bypass tube to ensure that the liquid level is synchronized with the liquid level in the container.   Convert float height to a 4 to 20mA signal 1. Principles • Magnetostriction or reed tube resistance chain technology can be used for position detection. • When the float moves with the liquid level, its magnetic field action triggers the measuring element to generate a resistance or frequency signal, which is converted by the transmitter into a standard 4 to 20mA signal.   Extended application and improvement suggestions 1. Remote monitoring and intelligence Combined with the wireless transmission module, the magnetic turnover level meter can achieve remote monitoring and control of data through the industrial Internet of Things. 2. Improved environmental adaptability • For high temperature and pressure environments, use ceramic or high temperature stainless steel. • For corrosive media, choose PTFE or other special coatings. 3. Compatible with various output signals In addition to 4 ~ 20mA, the design supports intelligent output modes such as Modbus and HART protocol to improve the compatibility with the automation system.   Conclusion The magnetic flap level meter is simple, intuitive and durable, and is suitable for a variety of liquid level measurement occasions. Despite the limitations of temperature and media, its application range and reliability can be further improved through reasonable selection and improvement.                                                                                                                          Thank you 

The main role of capillaries in pressure measurement or differential pressure measurement is to transmit pressure over long distances and to help protect sensitive pressure transmitters or sensors from high temperatures, corrosive media or vibrations in the measuring environment. Capillaries are often used with diaphragm seals (also known as diaphragms) to transmit pressure through a capillary filled with conductive fluid to a pressure transmitter, ensuring measurement accuracy and sensor safety. The main role and function of capillary 1. Long-distance pressure transmission (some occasions are not suitable for pressure tube) When the measuring point is a certain distance away from the pressure transmitter, it may be difficult to directly introduce the medium (such as gas, liquid, steam) into the pressure transmitter. Capillaries can transmit pressure over long distances, placing the transmitter in a location more suitable for maintenance or monitoring. For example, when measuring steam pressure, the transmitter can be damaged by high temperatures, and the capillary can keep the transmitter away from the high temperature source. 2. Isolation medium (corrosive medium requires special diaphragm material) : Capillaries are often used with diaphragm seals, which isolate the measuring medium from the pressure transmitter to avoid direct contact between the medium and the transmitter. This prevents corrosive or viscous media (such as acid-base liquids or high-temperature steam) from entering the transmitter and protects it from damage. 3. Control of thermal effect (beyond the limit range of the transmitter) : In high temperature situations (such as measuring the pressure of boiler steam), directly connected pressure transmitters can be damaged by high temperatures. By using a capillary, the capillary can be filled with a suitable conducting liquid (usually a liquid with a low temperature expansion coefficient), effectively reducing the effect of temperature on the pressure transmitter. This liquid can transmit pressure signals without transferring heat, protecting the transmitter from high temperature damage. 4. Reduce vibration effects: When there is severe mechanical vibration at the measuring point, the direct installation of the pressure transmitter may affect the measurement accuracy or damage the transmitter. With capillary tubes, the transmitter can be installed away from the vibration source, thus reducing the impact of vibration on measurement accuracy.   Examples of using capillaries 1. Boiler steam pressure measurement: In boiler steam pressure measurements, the temperature of the steam is usually very high (e.g., over 200°C). If the transmitter is installed directly at the measuring point, the high temperature of the steam will cause serious damage to the transmitter. Through the use of diaphragm seals and capillaries, steam pressure can be transmitted over long distances and at lower temperatures, allowing the transmitter to operate at the right temperature while ensuring measurement accuracy.   2. Differential pressure measurement of corrosive media in chemical plants: In chemical plants, certain media are highly corrosive. If this medium is allowed to come into direct contact with the differential pressure transmitter, the transmitter will be quickly damaged by corrosion. Therefore, by installing a diaphragm seal at the differential pressure measuring point and using a capillary to transmit the pressure signal to the differential pressure transmitter, the medium does not come into direct contact with the sensitive transmitter, thus protecting the device and extending its service life.   3. Differential pressure transmitter in liquid level measurement: When a differential pressure transmitter is used for level measurement (for example, tank level), the physical properties of the liquid (such as high temperature, viscosity, or corrosion) may affect the proper operation of the transmitter. Capillary and diaphragm seals can hold the transmitter away from the liquid while transmitting the pressure signal through the conducting fluid in the capillary. In this way, the transmitter is not in direct contact with the measured medium, reducing the risk of damage.   In summary, capillaries play a role in pressure transfer, medium isolation and environmental protection in pressure and differential pressure measurement, especially for high temperature, corrosive and vibration environments.                                                                                                                                                        Thank you 

Five categories of stainless steel Austenitic stainless steel. These are the most commonly used types of stainless steel. Compared with other alloy steels, austenitic stainless steels tend to have a higher chromium content and therefore higher corrosion resistance. Another common feature of austenitic stainless steel alloys is that they tend to be non-magnetic.   Ferrite stainless steel. The second most common form of stainless steel after austenitic alloys. As the name suggests, ferritic stainless steel is magnetic. These alloys can be hardened by cold working. They also tend to be cheaper due to lower nickel content.   Martensitic stainless steel .The least common category of stainless steel alloys. They tend to have lower corrosion resistance than ferritic or austenitic alloys, but they have high hardness. Martensitic stainless steel alloys are often ideal for applications requiring extremely high tensile strength and impact resistance. When the application also requires corrosion resistance, these alloys can be used with protective polymer coatings. Duplex (ferritic-austenitic) stainless steel. This kind of stainless steel is named "duplex stainless steel" because of its composition; It is made of half austenite and half delta ferrite. These stainless steels have better corrosion resistance, especially against chloride pitting, as well as higher tensile strength than standard austenitic stainless steels. Due to its physical properties and chemical resistance, duplex stainless steel is widely used in pipeline systems in the oil and gas industry or pipelines and pressure vessels in the petrochemical industry.   Precipitation hardened (PH) stainless steel. This type of stainless steel is made of durable, corrosion-resistant alloys with excellent strength. They are treated to yield strength three to four times that of standard austenitic stainless steel. They are most commonly used in the aerospace, nuclear, and oil and gas industries.                                                                                                                                            Thank you 

In applications where hydrogen is measured, pressure transmitters or differential pressure transmitters usually use stainless steel diaphragms. However, when handling and measuring hydrogen, it is common practice to gold-plate stainless steel diaphragms. The reason behind this involves the physicochemical properties of hydrogen and its interaction with metallic materials. Here's how:   1. Characteristics and permeability of hydrogen   Hydrogen (H₂) is one of the smallest molecules in nature and is extremely permeable. Its extremely small molecular size allows it to easily penetrate many solid materials, including metals such as stainless steel. When hydrogen penetrates the stainless steel diaphragm, it can cause the following problems: Hydrogen Embrittlement: Hydrogen atoms can diffuse into the lattice of stainless steel, causing the material to become brittle. Hydrogen infiltration will cause stress concentration, resulting in brittle fracture or damage of stainless steel under mechanical stress. • Measurement error: Hydrogen permeates the back of the diaphragm, affecting the strain characteristics of the diaphragm, which in turn affects the measurement accuracy of the transmitter.       2. The necessity of gold plating   Gold plating is used to reduce or prevent the penetration of hydrogen. Gold is a high density and chemically inert metal with excellent permeability resistance. The specific reasons are as follows: Low permeability: The permeability of gold to hydrogen is much lower than that of stainless steel. This is because gold has a tighter lattice structure and a dense array of atoms, which can effectively prevent hydrogen molecules from passing through. Corrosion resistance: Gold does not react with hydrogen and is therefore able to maintain its physicochemical stability so that it does not deteriorate or corrode when exposed to hydrogen. • Reduce hydrogen embrittlement: Because gold can block the penetration of hydrogen, the stainless steel substrate is not susceptible to the diffusion of hydrogen atoms, thereby reducing or preventing hydrogen embrittlement.   3. Mechanism of gold-plating treatment   When the stainless steel membrane is gold-plated, the gold layer acts as a physical barrier, preventing hydrogen molecules from penetrating the bottom layer of the stainless steel. This treatment significantly reduces hydrogen penetration, protects the structure inside the diaphragm, maintains the mechanical strength and elastic properties of the stainless steel diaphragm, and ensures that the pressure transmitter provides stable and accurate readings when measuring hydrogen.   Technical details include:   • Thickness of the gold plating: The thickness of the gold plating needs to be thin enough not to affect the sensitivity of the diaphragm, but also thick enough to prevent hydrogen from penetrating. Usually the thickness ranges from a few microns to tens of microns. • Gold plating process: Using technologies such as electroplating or physical vapor deposition (PVD) to ensure that the gold layer is uniform and void free to enhance its permeability resistance.                         4. Application examples and practical experience   In industrial applications, hydrogen is widely used in chemical industry, energy and other fields, pressure transmitter is the key measurement equipment. If there is no gold-plated protection, the stainless steel diaphragm will gradually fail after long-term exposure to hydrogen. Therefore, when measuring the pressure in high-purity hydrogen or hydrogen-containing environments, the choice of gold-plated diaphragm can significantly improve the service life and measurement stability of the instrument.   Sum up   Stainless steel diaphragms need to be gold-plated when measuring hydrogen because of the high permeability of hydrogen and the potential hydrogen embrittlement effect on stainless steel. By gilding the membrane, an anti-permeability barrier is formed to prevent the hydrogen molecules from penetrating, ensuring the measurement accuracy and long-term stability of the device.                                                                                                                                          Thank you

When the pressure transmitter is used to measure oxygen, it needs to be deoiled and degreased, because the characteristics of oxygen make it dangerous to react with organic matter such as grease in some cases, and even cause an explosion. The reasons and scenarios for this process are explained in detail below.   Characteristics and risk analysis of oxygen 1. Strong oxidation of oxygen: • Oxygen is a strong oxidizing agent that can react quickly with some fats and organic matter. When the grease is present, the oxidation reaction may release a large amount of heat at a faster rate, resulting in local high temperatures and possibly even a fire or explosion. 2. Increased risk of pressurized environment: • When the pressure transmitter is used in a high-pressure oxygen environment, the oxidation activity of oxygen is significantly enhanced, which increases the risk of contact with grease. 3. The role of particle pollutants: In addition to oils and fats, some solid particles (such as rust or dust) may also act as catalysts for oxidation reactions, further increasing the risk.   The purpose of degreasing 1. Prevent oxidation reaction: • Degreasing removes grease or organic matter from the sensor surface or internal channels to avoid contact between oxygen and grease. 2. Improve measurement security: • The treated equipment can effectively reduce accidents caused by grease and improve the reliability and safety of system operation. 3. Ensure measurement accuracy: • Grease residue may adsorb particles or lead to blockage of internal flow channels, affecting sensor performance and measurement accuracy.   The specific method of degreasing 1. Chemical cleaning: • Clean the sensor with a special degreaser (e.g. Trichloroethylene, alcohol, etc.). 2. Ultrasonic cleaning: • Ultrasonic cleaning of sensor components to remove stubborn grease. 3. High temperature drying: • After degreasing cleaning, remove residual cleaning agent and moisture by drying. 4. Verification and inspection: • After degreasing, the treatment effect can be confirmed by UV lamp, residual oil test paper or oxygen exposure test.   When is degreasing necessary Special attention should be paid to deoiling and degreasing in the following scenarios: 1. The medium is pure oxygen or high oxygen concentration gas: • High purity oxygen (usually purity >99%) or high concentration oxygen environment, oxidation is significantly enhanced. 2. High system pressure: • When the oxygen pressure in the system is high (such as >1MPa), the reactivity of high-pressure oxygen is greatly improved, and it must be strictly degreased. 3. Medical or Aerospace applications: The safety of oxygen in medical devices (such as ventilators) and aerospace environments is extremely high and must be free of grease contamination. 4. High ambient temperature: • If the measured ambient temperature is high (e.g. >60°C), the increase in temperature will accelerate the oxidation reaction of oxygen. 5. There are highly sensitive parts: • When there are components in the system that are susceptible to contamination or reaction, such as high-precision valves or coating materials.   Under what circumstances does degreasing not need to be done? Deoiling and degreasing can not be performed under the following conditions: 1. The medium is air rather than pure oxygen: • The oxygen concentration in the general air is low (about 21%) and the pressure in most systems is low, so the risk is relatively small. 2. Low system pressure and temperature: • At low pressure (e.g., normal pressure or below 1MPa) and low temperature, the possibility of oxidation reaction is greatly reduced. 3. The system has low security requirements: • In non-critical applications, the presence of small amounts of grease in the system does not significantly affect operational safety.   Brief summary The deoiling and degreasing treatment when the pressure transmitter measures oxygen is to avoid the reaction of oil and oxygen and improve the safety of the system. The specific treatment requirements depend on the oxygen purity, pressure, temperature and application scenario. In high-purity, high-pressure oxygen systems and areas with high safety requirements, such as medical, aerospace, etc., deoiling and degreasing must be strictly carried out, while it is not necessarily required in ordinary air or conventional applications.                                                                                                                                             Thank you   

The drop type liquid level gauge is a sensor used to measure the height of liquid, especially suitable for various liquid storage tanks, rivers, reservoirs and other occasions. It determines the level height by measuring the static pressure of the liquid.   The detailed explanation of the working principle 1. Core components • Pressure sensor: detect the static pressure P=pgh generated by the liquid, and convert the pressure signal into an electrical signal. • Signal processor: Converts the electrical signal output by the sensor into a standard output signal (such as 4-20mA, 0-10V). • Ventilation cable: Balance the internal pressure of the gauge with the atmospheric pressure. 2. Pressure range design The measuring range of the submersible level gauge is determined by the pressure measuring range of the sensor, so it is necessary to select a level gauge suitable for the specific liquid depth. 3. Temperature compensation Part of the input level meter integrates a temperature sensor, which can compensate the change of liquid density caused by temperature change and improve the measurement accuracy.   The use of occasions 1. Industrial water treatment It is used in sewage treatment plants and water plants for liquid level measurement of clear pools and sumps. 2. Petrochemical industry For liquid crude oil, chemical solvent storage tank level monitoring. 3. Groundwater and environmental monitoring It can be used in groundwater level monitoring Wells, reservoir water level changes, river flood warning and other scenarios. 4. Food and beverage industry Sanitary input level gauges can be used in milk, beverage and beer storage tanks.   Advantages and Disadvantages Advantage 1. Simple structure: no moving parts, low failure rate, low maintenance cost. 2. Strong durability: Modern input level gauges can be made of stainless steel or special alloy materials, and can withstand high pressure and      a variety of chemical media. 3. High level of protection: many devices reach IP68 level and can be immersed in water for a long time. Disadvantages 1. Environmental sensitivity • Atmospheric pressure changes: Although the snorkel balances the pressure, accuracy can be affected if it is blocked or poorly sealed. • Temperature impact: Extreme temperature conditions may affect sensor stability. 2. High maintenance requirements It is easily affected by silt and impurities in dirty liquids and needs to be cleaned regularly.   Installation and maintenance precautions (detailed explanation) Installation procedure 1. Location selection Avoid stirrers or places where the flow is intense, and choose an area where the liquid flows steadily. 2. Fixing method • Use guide tubes in deep Wells or large containers to avoid sensor drift. • Use a hook, bracket, or dedicated mounting to secure the level gauge. 3. Protect the ventilation cable • Prevent ventilation cables from being broken or damaged. • Ensure that air holes are unblocked to prevent dust and water vapor from entering. 4. Cable connection • When connected to a standard signal transmitter, check the power supply polarity to prevent damage to the instrument. • Use shielded cables to avoid electromagnetic interference. Maintenance suggestion 1. Regular calibration The liquid level gauge should be calibrated regularly to prevent sensor drift from causing errors. 2. Anti-clogging measures For environments that are prone to deposition of impurities, you should consider adding a filter cover or cleaning it regularly. 3. Check the cable integrity Ensure tightness to prevent water vapor from entering and damaging internal components.   Typical application cases • Reservoir dam monitoring: The submersible level meter can be used in the reservoir's automatic water level monitoring system to provide real-time water level data for flood warning and storage management. • Industrial tank level control: For oil storage tanks in the petrochemical industry, combined with control systems to achieve level alarm and automatic control. Through the above explanation, you can have a more comprehensive understanding of the application and maintenance of the input level meter.                                                                                                                                                               Thank you