2 wire is used to distinguish electrical connections for measurement signals which use only two connections for carrying both the power supply and signal. The most common example is a 2 wire 4-20mA current loop output.
2 wire is also used to describe a resistive thermometer that is wired so that there is no compensation for errors caused by the connecting wire on each side of the resistive thermometer. Therefore a 2 wire connected resistive thermometer will be less accurate than 3 wire, or 4 wire compensation method.
- Underground rain water storage tank level sensor and readout for 2 metre depth
- HART® Pressure Transmitters
- DMP331i High Accuracy Pressure Transmitter
- Low Pressure Transmitters
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Measurement Signal Related Terms
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