What is the difference between a pressure switch and a pressure transmitter?
Pressure Transmitter: When the pressure signal acts on the sensor, the pressure sensor converts the pressure signal into an electrical signal, amplified by the differential amplifier and the output amplifier, and finally converted to the liquid level of the measured medium (liquid) by the V / A voltage and current Pressure into a linear relationship between the 4-20mA standard current output signal.
Pressure switch: When the system pressure is higher or lower than the rated safety pressure, the sensor inside the disc instantaneous movement, through the connecting rod to push the switch connector connected or disconnected, when the pressure dropped to or rise rated recovery The switch is automatically reset, or simply say that when the measured pressure exceeds the rated value, the free end of the elastic element displacement, directly or after comparison to push the switching element, change the switching element on-off state , To achieve the purpose of controlling the measured pressure. The pressure switch uses elastic elements such as single-ring spring tube, diaphragm, diaphragm and bellows.
Main technical parameters Power supply: 24VDC output 4 ~ 20mA Two-wire zero adjustable range: ± 5% FS Range adjustment ratio: 3: 1 or more Range: -100kPa ~ 0 ~ 60MPa Load characteristics: load in the 0 ~ 600Ω (24VDC Power supply) Maintain constant current output Flameproof type d II BT4, intrinsically safe ia II CT5 Overvoltage limit: 2 times to the upper limit Pressure range: Process: -20 ~ 60 ℃ Accuracy class: ± 0.5% Stability: ± 0.2 % FS Weight: about 1kg characteristic analysis
