8oz pH/EC Calibration Solution Kit (pH 7.00, 4.00, 10.01, 1413µS, 12.88mS, 84µS), 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 (1 per EA )
pH/EC Calibration Solution Kit, pH 7.00, 4.00, 10.01, 1413uS, 12.88mS, 84uS, 8 oz, storage solution 4 oz, CalBox included is available to buy in increments of 1