The Wheatstone Bridge The Wheatstone Bridge consists of a de voltage source, four resistors and a detector. The detector is a type of ammeter called a galvanometer. VDC R₁ RS a m 22 m C Consider using a Wheatstone bridge having R₁ = 200 2 and R₂ = 2000 2 to measure a resistance, R, of a temperature sensor. Suppose the resistance of the temperature sensor, Rm, in 2, is related to the temperature 7, in °C, by the equation Rm=1500+257 The temperature is expected to vary over the range 0 to 100 °C. Over what range must R3 vary in order for the bridge to measure temperature over the range 0 to 100 °C?