|Typical Applications:||Liquid, Corrosive Liquid||Signal Output::||4~20mADC/HART/RS485|
|Ambient Temperature:||-40 〜85 °C||Process Temperature:||-10 ~+70 °C|
|Process Connection:||Thread Flange Mounting (optional)||Power Supply:||24VDC (± 5%)|
|Load Capacity:||< (U-15) / 0.02A||Diaphragm Material:||316L, Ceramic Diaphragm (optional) Case Material: Aluminum, Stainless Steel (optional)|
NH93420 Input Type Water Level Pressure Transducers HART Ceramic Diaphragm
NH93420 Liquid Level Transmitter Pressure Sensor Transmitter
NH93420 series liquid level transmitter is the extension and development of pressure transmitter technology, according to the principle of linear relationship between the pressure generated by different specific gravity of liquid at different heights, to achieve accurate measurement and transmission of water, oil and paste volume, liquid height, weight.
NH93420 Liquid Level Transmitter Technical Parameter
|Typical applications||Liquid, corrosive liquid|
|Ambient temperature||-40 〜85 °C|
|Process temperature||-10 ~+70 °C|
|Process connection||thread flange mounting (optional)|
|Power supply||24VDC (± 5%)|
|Load capacity||< (U-15) / 0.02A|
|Diaphragm material||316L, ceramic diaphragm (optional) Case material: aluminum, stainless steel (optional)|
|Stability||±0.05%FS/ year; ±0.1 %FS/ year|
|Field display||LCD (optional)|
|Level of protection||IP67|
|Blast class||Exia II CT5 Exd IIBT5 (optional)|
※ Note: Products can be customized according to the specific requirements of users!
NH93420 Liquid Level Transmitter Operating Principle
The liquid level transmitter consists of a special gas guide cable built into a capillary hose, a compression joint and a probe. The probe of the level gauge is constructed of a stainless steel core with a diaphragm at the bottom and a plastic shell with holes. The liquid level measurement is actually the difference between the hydrostatic pressure on the probe head and the actual atmospheric pressure, and then the ceramic sensor (attached to the stainless steel film) and the electronic component convert the pressure difference into the 4〜20mA output signal.
When the hydrostatic liquid level transmitter is put into a certain depth of the measured liquid,the pressure formula of the sensor is as follows: PA= p・g・h+Po to obtain the liquid level formula:h = PA- Po/ p*g.
At the same time, the pressure of liquid is introduced into the positive pressure chamber of the sensor through the gas conduction stainless steel, and then the atmospheric pressure on the liquid surface is connected to the negative pressure chamber of the sensor, so as to counteract the Po, on the back of the sensor and make the measured pressure of the sensor PA-Po= p・g・h.
If the density of the liquid is uniform, the static pressure difference is proportional to the height of the liquid level.
NH93420 Liquid Level Transmitter Design Features
Contact Person: Janna.wang