Alpha Chem is manufactures, exporter & suppliers of Digital Potentiometer. Digital Potentiometer 3 digit LED display along with Glass, silver , platinum , reference electrode mains operated. Range pH 0 to 200 mV 0 to 2000 Accuracy pH mV 1 mV 1 digit Resolution 0.1 mV Slope correction 80% to 120% Ambient Temperature 0 C to 50 C Display 3 digit LED display Power 230 V 10% 50Hz AC Dimensions 275x175x85 mm Accessories 1) Glass, Reference , Silver and Platinum Electrodes 2) Dust cover 3) Instruction manual.