Bridge-based sensors work by replacing one or more of the resistors in a Wheatstone Bridge, as shown below.This circuit is used inside the NI-9237 to condition the signal from the sensor. Replacing a single resistor is called a "Quarter-Bridge" configuration. Replacing two resistors with two sensors is called a "Half-Bridge" configuration. Replacing every resistor with a sensor is called a "Full-Bridge" sensor. Note that in Quarter-Bridge and Half-Bridge modes, the sensor's "rest" resistance should be close or equal to the resistance of the other bridge resistors.
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