Temperature Transmitter
A temperature transmitter converts the thermocouple or RTD signal to a 4-20 mA output signal and is the ideal solution for many remote temperature measurement applications.
To operate a two-wire transmitter from a remote location, no AC power is necessary.
The remote site does not require additional power because transmitters are powered by a low level 4 - 20 mA output current signal. Furthermore, in plants with a high level of instrumentation, the conventional 24 Vdc signal is used for operation.
Users of two-wire transmitters do not experience electrical noise or signal deterioration. When it comes to ambient electrical noise, the transmitter's current output signal provides excellent immunity. The receiving device's common-mode rejection usually prevents any noise from appearing in the output current. Furthermore, unlike most voltage signals, the current output signal does not diminish or fluctuate with distance.
Transmitters are a cost-effective way to convey temperature from remote sensors to PLCs or other control systems.