The DM235 superseded the highly successful DM2 multimeter.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.