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DC Null Voltmeter

For measuring low voltages especially the differences between two Voltage References I build the DC Null Voltmeter from Conrad Hofman.
The Mini Metrology Lab, Part 2

This is a switchable chopper based (LTC1050) DC Amplifier with a max. Gain of 10000!

For testing i build a Voltage DIvider with an Vishay CNS471A6.
It is amazing to measure 10µV with common Multimeter in the 100mV Range.

Here Pictures from the Bench.

Null Voltmeter_web

 

NullVoltmeter_2_web

No Housing yet.

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