The DM350 was the next step up from the DM235 in the Sinclair range of multimeters. It was aimed at the semi-professional market, offering a 3.5 digit display and 34 ranges with a claimed accuracy of 0.1%. Like the DM235 and the top-of-the-range DM450, it used a common design of external case. The device remained in the Sinclair (and later Thandar) product range until well into the 1980s.