Temperature Sensors, analogue 4…20 mA

Temperature sensors with an analogue output

A resistance thermometer delivers ohms, a thermocouple millivolts – a control system can do nothing directly with either. The sensors here already carry the transmitter in the terminal head and output 4…20 mA: immune to interference over long cables, no software needed, into any free analogue input.

Some of the devices superimpose a HART signal on the current. The analogue output stays exactly as it is, while configuration, adjustment and diagnostics run over the same two wires. For measuring points without a cable route see the wireless sensors. Anyone who prefers a passive sensor and a separate transmitter will find those under temperature transmitters.