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

※ 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

• Simple installation, easy to use, strong interchangeability.
• Suitable for measuring liquid level and interface of liquid medium in container. In addition to the field indication, can also be equipped with remote transmitter, alarm switch, complete detection function.
• Novel indication, intuitive reading, eye-catching, observing the direction of the indicator can be changed according to user needs.
• Large measuring range, not limited by the height of storage tank.
• The indicating mechanism is completely isolated from the tested medium, with good sealing performance, high reliability and safe operation.
• Simple structure, easy installation, easy maintenance, corrosion resistance, no power supply, explosion-proof.
• High quality sensor sensitivity, fast response speed, accurately reflect the flow or static liquid level of subtle changes, high measurement accuracy.
• With intrinsically safe explosion-proof and isolation explosion-proof ability, can be used in various dangerous places.
• The anti - blocking design can realize the measurement of liquid level in paste medium.
• It is very convenient to read on site with three kinds of indicator heads: 100% equal-scale scale, LED and LCD.
• 4-20mA DC two-wire signal transmission, strong anti-interference ability, long transmission distance.
• Fine unique zero, full range, nonlinear compensation, to ensure the instrument within the range of operating conditions of precision, long-term stability.
• Pressure sensor directly sense liquid level pressure, not affected by media bubbling, deposition.

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