μV
microvolt
Voltageexact by definition
The microvolt is one millionth of a volt. It is the working scale of biopotential measurement and of low-level signal chains: an EEG electrode sees tens of microvolts, and a type-K thermocouple moves about 41 microvolts per degree Celsius. The factor of 1e-6 is exact, being an SI prefix.
Watch out: At microvolt levels the measurement is usually dominated by thermal EMFs at connector junctions and by amplifier offset drift, so a reading is only meaningful alongside a stated reference junction or a zeroing procedure.
| 1 μV | 0.000001 V |
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