Apera Instruments 2301-C PVC-body Conductivity Electrode adopts Apera's platinum black sensor technology, which significantly reduces electrode polarization and ensures high accuracy in a wide range of conductivity measurement (0.5 µS/cm to 200 mS/cm). It is designed for both laboratory and in-field use. Measuring Range: 0. 5 µS/cm to 200 mS/cm; Electrode Constant: K=1. 0 0. 2cm^-1; Dimension: ø12*155mm; Connector: BNC; Cable length: 3 Ft; Compatible with any conductivity meters that have BNC connectors. The product is CE and RoHS certified, and is manufactured under an ISO 9001: 2015 certified quality system.