Pressure transmitter pressure to accept a variable conversion after sensing the pressure change amount by a certain percentage into a standard output signal of the instrument.It will change the gas load cell sensor felt, liquid pressure and other physical parameters into a standard electrical signal (eg 4 ~ 20mADC, etc.), in order to supply indication Alarming device, recorder, regulators and other secondary instrument to measure, instructions and the process of adjustment. 
ST301 type Pressure transmitter 
ST301 type Pressure transmitter is the use of advanced circuit linearity and temperature compensation technology, the drift coefficient lower linear better, stronger anti-interference. Its general drift is much lower than similar products for gas, liquid, vapor pressure measurement and a variety of corrosive media. 
Widely used in petroleum, chemical, metallurgy, electric power, light industry, machinery and other fields. The product is die-cast aluminum housing, equipped with simulated field indicator, with a variety of process connections can be adjusted in the field zero, span, 100% configurable linear pointer table or a liquid crystal display meter. 
Features 
Improve the compensation circuit, good linearity, measurement accuracy, good long-term stability; 
Zero error is small, wide measuring range, accuracy up to 0.1%; 
Zero and span can be continuously adjusted in the external, wide-scale migration range; 
With reverse polarity protection and current limit protection; 
Anti-surge, anti-RF interference, applicable to frequency interference and other strong industrial environment; 
High-resolution, high-impedance, low power consumption;

Technical Parameters 
Measuring media: 316L all kinds of non-corrosive gas liquids and the like 
Survey styles: absolute pressure (A), relative pressure (G) 
Working temperature: -40 ~ 65 ℃ 
Compensation temperature: -10 ~ 70 ℃ 
Drift coefficient: ± 0.01% FS / ℃, ± 0.005% FS / ℃ 
Comprehensive Accuracy: 0.1, 0.2, 0.5 
Stability: less than 0.2% FS / years, 0.5% FS / Year 
Overload: 1.5 to 5 times FS 
Power supply voltage: 24VDC 
Select Output: 4 ~ 20mA, 0 ~ 10mA, 0 ~ -5V, 1 ~ 5V 
Protection: IP65 

Overall Structure 
Electronic housing: aluminum alloy 
The main structure: stainless steel 
Coating: plastic coating 
Pressure connection: M20 × 1.5 (standard interface) 
M27 × 2 (flush diaphragm standard interface) 

The connection process 
External thread connection M20 × 1.5 standard interfaces, 
Bore Ф3mm, Ф10mm, 
Connecting member 316 or 304 stainless steel material.

Relative pressure measuring absolute pressure in the form of negative relative pressure 
The maximum measuring range (0 ~ 300) MPa (0 ~ 100) MPa (-0.1 ~ 40) MPa 
The minimum measurement range (0 ~ 100) Pa (0 ~ 5) KPa (-50 ~ 50) Pa