Apera Instruments, LLC-AI314 Premium Series EC60 Waterproof Conductivity Pocket Tester Kit, ±1% F.S Accuracy, Easy Switch of EC/TDS/Salinity, Replaceable Probe

Replaceable Platinum Black conductivity sensor Apera's platinum black conductivity sensor minimizes electrode polarization, expands measuring range, and increases the firmness of the electrode, hence ensuring a significantly higher accuracy (±1% of full scale) in a wide-range conductivity measurement (0 to 20 mS/cm) than conventional stainless steel electrodes, and takes minimal maintenance.

You get the control of accuracy The tester allows you to perform 1 to 2 points of calibration with lab-grade NIST traceable standard solutions to ensure high measurement accuracy.