Signals & Electrical
Loop-powered
A device that takes its operating power from the measurement current loop.
IN ONE SENTENCE
The same 4-20 mA loop powers the instrument and carries its signal.
In normal English
This reduces cabling and is very common in process instrumentation, especially pressure, level and temperature transmitters.
Why would I use it?
Use it where a two-wire 4-20 mA installation is desirable.
THINK OF IT LIKE…
The communication line also pays the sensor's electricity bill.
Related terms
4-20 mA, 2-wire sensor, transmitter
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