If you are making a project with remote temperature sensors and you are using thermocouple you definitely need a thermocouple amplifier. This circuit uses OP07 non inverting amplifier. The circuit has 50Hz filter to reduce reading jumps when hight three phase contactor operates. It also has industrial protection which protects open sensor in case the thermocouple breaks. Circuit has potentiometer adjustable gain and offset. If higher gain than 100 is needed that use instrumentation amplifier or chopper stabilized amplifier. [Link]

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