Product Information - 4WFB120
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120 Ohm 4-Wire Full Bridge Terminal Input Module
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Brochure, Version Date: October, 2008  Brochure
Manual, Version Date: May, 2007  Manual

Features

  • Connects directly into datalogger input terminals; "prongs" on lower surface are secured into datalogger screw terminals
  • Makes accurate measurement of 120 Ohm strain gauges simple; gauges are measured with a Full Bridge measurement instruction

General Description

Terminal input modules (TIMs) are small peripherals that provide completion resistors for resistive bridge measurements, and act as voltage dividers and precision current shunts. The modules attach directly to the datalogger's input terminals.* Each module provides circuitry to connect one sensor, except for the voltage dividers which allow connection of two single-ended sensors.

The 4WFB120 supplies two or three legs of a "Wheatstone" or full bridge measurement for a sensor having a nominal resistance of 120 Ohms. The wheatstone bridge circuit is used to convert small changes in resistance to an output voltage. The 4WFB120 is most commonly used for providing completion resistors for quarter-bridge or half-bridge strain measurements with 120 Ohm resistive strain gauges. It supports both 2 and 3 wire gauges.

* Note: Limited compatibility with silver CR10 wiring panel.

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