What is a Kelvin multi cellular voltmeter?

It is a quadrant type voltmeter, based on electro statistics..It has a torsion head for zero adjustment.A coach spring for protection against acccidental vibration.Damping is done by a vane immersed in a dashpot. read more

The multicellular voltmeter was introduced in 1887 by the famous mathematical physicist William Thomson, 1st Baron Kelvin (1824-1907) to meet a demand from the then growing electrical supply industry for instruments capable of measuring high voltages (it is capable of measuring up to 20,000 volts). read more

Since no current flows through the device (the two terminals are isolated), the voltmeter is almost ideal. Practically all electrostatic voltmeters are founded on the types developed by Lord Kelvin. The voltmeters were first produced in 1888, and later models were able to measure voltages up to about 20,000 volts. read more