Sinclair Radionics, 1978
DM235 superseded the highly
multimeter. It was a higher specification unit, with
a 3.5 digit display and offering 21 ranges with
a claimed accuracy of 0.5%. In other respects, it was
very much an evolution of its predecessor, constructed
using much the same dull but sensible external design.
It was a reliable and useful unit which continued to
be sold by Sinclair and Thandar well into the 1980s.