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.
4 to 20 mA current loop signal measurement products
Water Level Transmitters with 4-20mA Output
LMK 487 Submersible Ballast Tank and Draught Level Pressure Transmitter
Analog Output Pressure Gauges
LMP305 Borehole Level Transmitter
Measurement Signal Related Terms
More pages related to measurement signal technical terms.
- 3 Wire
- 4 to 20 mA Current Loop Output Signal
- 4 Wire
- Amplified Voltage Output
- BFSG – Bonded Foil Strain Gauge
- Deadband
- Digital Interface
- FSO – Full Scale Output
- HART®
- High Frequency Response
- Intrinsic Safety
- Measurement Signal
- Millivolt Output Pressure Transducers
- mV/V – Millivolts per Volt Output Signal
- NC – Normally Closed
- NO – Normally Open
- Piezoresistive Strain Gauges
- Pressure Transmitters
- Rangeable
- Ratiometric
- Span
- Span Offset
- Span Sensitivity
- Square Root Extraction
- Threshold
- Totalizer
- Transducer
- Transmitter
- TSL – Terminal Straight Line
- TSS – Thermal Span or Sensitivity Shift
- Turndown Ratio
- USB
- Vented Cable
- Voltage Output Pressure Transducers
- Wheatstone Bridge Strain Gauge
- Zero Offset
- Zero Tare