8oz pH/EC Calibration Solution Kit (pH 7.00, 4.00, 1413 µS, 12.88 mS), 4oz Storage Solution for pH/ORP Electrodes, plus Apera’s CalBox for easy calibration Standardized against NIST certified references at 25°C (77°F), ideal for the calibration of all typ (1 per EA )
8oz pH/EC Calibration Solution Kit (pH 7.00, 4.00, 1413 µS, 12.88 mS), 4oz Storage Solution for pH/ORP Electrodes, plus Apera’s CalBox for easy calibration Standardized against NIST certified references at 25°C (77°F), ideal for the calibration of all typ