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INTRODUCTION
Imported high precision and high stability pressure sensitive chips are selected for diffused silicon pressure transmitter. Sensitive chips are fabricated by advanced micro-mechanical etching process, which forms Wheatstone bridge by diffusing four high-precision resistors with temperature compensation on silicon wafers. Because of piezoresistive effect, there are some changes on the resistance values of the four bridge arm resistance, so as to make the bridge unbalanced, and then the sensor outputs an electric signal corresponding to the change of pressure. The output electric signal is compensated by amplification and non-linear correction circuit, which generates voltage and current signals which correspond linearly to the input pressure. |
Characteristics
(1) Compact structure and easy to install. (2) Advanced diaphragm/oil-filled isolation technology. (3) High stability and reliability. (4) Seismic resistance and anti-radio frequency interference. (5) 316L stainless steel isolation diaphragm structure. (6) High precision, all stainless steel structure. (7) Micro-amplifier, voltage and current signal output. (8) Strong anti-interference and long-term stability. (9) Variety of process connections are available. (10) Wide range of measurement. It can measure absolute pressure, gauge pressure and sealing reference pressure. (11) Anti-vibration and anti-impact. |
TECHNICAL SPECIFICATION
Power Supply | P300: (4~20)mA output:(10~32)V; (0~10)V output:(12~32)V; RS485 output:(8~32)V; |
P400 with display: (4~20) mA output:(12~32)V; (4~20) mA+RS485 output:(10~32)V | |
P400 without display: (4~20) mA output:(9~32)V | |
Output | (4~20)mA;(1~5)V; (0~10)V;(0~5)V;RS485 |
Accuracy | 0.2%、0.25%、0.5% |
Measurement range | -0.1…0…60Mpa |
Pressure type | gauge pressure, adiabatic pressure and sealed pressure |
Compensation temperature | -10℃～70℃ |
Working temperature | -20℃~85℃ |
Medium temperature | -20℃~85℃, P300G: -20℃~300℃ |
Storage temperature | -40℃~85℃ |
Zero-point temperature drift | ±0.3%FS/10℃ |
Sensitivity temperature drift | ±0.3%FS/10℃ |
Overload pressure | (0.035~10)MPa (150%FS) (10~60)MPa (125%FS) |
Long-term stability | ±0.2%FS/year |
Response time | RS485 output≤100ms（up to 90％FS） Current and Voltage output≤10ms（up to 90％FS） |
Insulation | 20MΩ/250VDC |
Ingress protection | IP65 |
Load Resistance | (U-9V)/0.02A |
