4-20mA Current Loop Bridge Sensor Transmitter

Bridged resistive sensing elements is common in resistive type sensors/transducers. This sensor type need a biasing voltage to operate. LM10 provide low reference voltage, which is suitable for powering usually low resistance bridge type sensors such as strain gauges. The reference voltage is not only supply the power to the bridge but also provide offset to set the output at mid level of its operating range when the bridge sensor is balanced. Here is the schematic diagram of the circuit:

Transmitter for Bridge Sensor circuit schematic diagram

[Circuit’s schematic diagram source: National Semiconductor Application Note]

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