Selection of humidity transmitters
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Control system: Yokogawa VP. Monitoring object: Ambient air humidity at the air compressor inlet. I would like to choose a two-wire transmitter.
As long as it is a standard signal input, it can be fed into the system
However, a two-wire system is required; the card is already set up for a two-wire configuration. If it’s a different type of circuit, then the jumpers on the card need to be modified. Many products on the market these days are of the 3/4-wire system.
Use an integrated thermometer, 4~20mA
Buy one with a module that provides a 4-20ma signal directly on the secondary line