Pressure sensor's output signal in the market now there are many, there are mainly 4-20 ma, 0 to 20 ma, 0 to 10 v, 0 to 5 v, etc., which are frequently used but 4-20 ma and 0 to 10 v, the output signal for above, only 4-20 ma for two wire system, the output of a few wire system does not contain grounded or shielded wire, other are all three wire system.

Connection between pressure sensor and other electronic equipment depends on many factors. Is connected by short or a long connection? Controller or display the distance between the sensor and system, whether there is noise "or other electronic jamming signal. No need to amplifier, the position of the amplifier, etc. For many short the distance between the sensor and controller of OEM devices, using mA output of the transmitter is most economic and effective solution, if you need to output signal amplifier, had better use transducer with built-in amplifier. For long distance transmission or exist strong electronic jamming signal, had better use mA output level or frequency output. If in the environment of the RFI and EMI index is high, besides wanting to notice to choose mA or frequency output, but also take into account the special protection or filters.