The Apera Instruments 201T-F 3-in-1 combined pH electrode measures pH and temperature simultaneously and supports automatic temperature compensation. It is ideal for pH measurement of normal water solutions in scientific research, environmental monitoring and quality control. Not suitable for measurements in solutions with low ion concentration (e.g. de-ionised or distilled water), strongly basic solutions (pH > 12), highly corrosive liquids or for continuous testing in high temperature solutions (> 60 °C). Compatible Apera Instruments instruments: PH850, PC850, PH8500, PC8500, PH700, PH910, PC910, PH950, PC950, MP511, PH800, PC800, PH820, PC820, SX811. Uses a KCl gel electrolyte, no need to refill. Removable probe cap, easy to clean. Polycarbonate housing, is shock and corrosion resistant, ideal for use in the laboratory and other specialist areas. Diaphragm: Ceramic Reference electrode: Ag/AgCl Size: ø12 x 160 mm Temperature sensor: 30KΩ Thermistor 201T-F 3-in-1 pH/Temp. electrode, ATC Enabled, BNC/RCA Connector