Temperature Probe for Digital Multi Meter

This is a simple temperature measurement probe circuit. This circuit measures temperature either on a PC board or at the probe tip to which contains the temperature sensor. It can be used for debugging and troubleshooting electronic circuits. Here is the schematic diagram of the circuit: This circuit uses the MAX6610 as temperature sensor. We can scale the output to […]

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4mA–20mA Loop Powered Temperature Sensor

This circuit is used to allow  a 4mA–20mA to power an analog temperature sensor. To provide a 4mA–20mA output over a 3.75V–28V compliance range this circuit uses an op-amp, low-dropout linear regulator, transistor and an analog temperature sensor. It  is powered by the loop with the only consequence being a slight offset error because of the quiescent current of the […]

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