Cambridge versatile galvanometer

serial Nos. L-318992 and L-345256

Inside view, note the circular moving coil which rotates around a spherical magnetic core

I was given two of these meters which formed part of a  collection of many instruments collected by Bob Evans by his daughter Alice Kirby. They both have o-120 mV movements. The one shown above has a thermal junction which gives a full scale reading of 12 Volts and may be used for measuring the RMS value of AC or DC voltages. This is a more modern version of the other Unipivot laboratory instruments elsewhere on this site (here and here). Like its predecessors it is intended to be used with a range of accessories as indicated on the diagram shown here.

Working. Cambridge Instrument Company Ltd, UK, date probably mid 1950s (I have instruction  booklet dated 1954)