Pressure sensor wiring has always been a * to win more customers purchasing process consulting one of the problems, many customers do not know how sensor wires, in fact, the connection mode of various sensors basic are the same, there are generally two pressure sensors wire, three wire system, four wire system, some have five wire system.
Pressure sensor two wire system is simple, general customer all know how to wiring, a line connecting the power supply positive, another line is the instrument is connected to the negative power supply line, this is * simple, pressure sensor three-wire system is based on two wire system added a line, this wire is directly connected to the power of the cathode, a two wire system a little trouble.
Four wire pressure sensor must be two power input, the other two are signal output terminal.
Four wire system mostly voltage output instead of 4 ~ 20 ma output, 4 ~ 20 ma called pressure transmitter, most made two wire system.
Pressure sensor signal output of some of them are not amplified, full scale output only a few millivolts, and some of the pressure sensor in the internal amplifier circuit, output in a full range of 0 ~ 2 v.
As to how to display instrument, to look at the range of instrument is how much, if you have and the output signal of gear, can be directly measured, otherwise to add signal adjusting circuit.
Five wire pressure sensor with four wire were similar, five wire sensors on the market are less.
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