Apera 2301T-F Conductivity Electrode adopts Apera's unique BPB (Brush-resistant Platinum Black) conductivity sensor technology, which ensures high accuracy in a wide range of conductivity measurement. The built-in thermistor tests temperature simultaneously and allows for auto temperature compensation. It is ideal for both general laboratory and in-field use. Measuring Range: 0. 5 µS/cm to 200 mS/cm; Electrode Constant: K=1. 0 0. 2cm^-1; Temperature unit: 30KΩ Thermistor; Dimension: ø12*155mm; Connector: BNC/RCA; Housing: Polycarbonate; Cable: 3 Ft Compatible Apera Models: EC700, EC800, PC800, EC820, PC820; May NOT be compatible with other brands' meters because the temperature unit might be incompatible.