The pressure transmitter is mainly composed of three parts: load cell sensor (also called pressure sensor), measuring circuit and process connector. It can convert the physical pressure parameters such as gas and liquid sensed by the load cell sensor into standard electrical signals (such as 4-20mADC, etc.) to provide secondary instruments such as indicating alarm, recorder, regulator, etc. for measurement, indication and process regulation.

The pressure transmitter is an instrument that accepts the pressure variable and converts the pressure change into a standard output signal in a certain proportion after sensing conversion. The output signal of the transmitter is transmitted to the central control room for pressure indication, recording or control. It is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military, petrochemical, oil well, electric power, ships, machine tools, pipelines and many other industries. Here is a brief introduction to the principles and applications of some commonly used sensors.

Pressure type: gauge pressure, absolute pressure, sealing pressure

Range: - 100kPa... 0~10kPa... 100MPa

Input impedance: 2k Ω~5k Ω constant current; 3k Ω~18k Ω constant voltage

Zero point output: ± 2mV

Full range output: 1.5mA excitation ≥ 40mV (≤ 35kPa), 60~150mV (other ranges);

10V excitation ≥ 60mV (≤ 35kPa), 80~120mV (other ranges)

Excitation: constant current 1.5mA; Constant voltage 10V

Precision: 0.25% F.S. (typical)

Operating temperature: - 40 ℃~125 ℃

Compensation temperature: constant current 0 ℃~60 ℃ (≤ 35kPa), - 10 ℃~70 ℃ (other ranges); Constant pressure - 20 ℃~85 ℃

Shell and diaphragm material: stainless steel 316L

Filling liquid: silicone oil