Calibration Kit pH (5 pH4.01 & 5 pH7.01 sachets)

Calibration Kit pH (5 pH4.01 & 5 pH7.01 sachets) Achieve accurate pH readings and check your meter and electrode is functioning correctly with Hanna buffer solutions. Available in convenient, ready-made pH values, Hanna has a certified value calibration solution with an accuracy of +/- 0.01pH @ 25?C for all requirements. Available in 230ml, 500ml, 1 litre, and 1 gallon bottles, plus individually sealed foil sachets containing 20ml of ready-to-use solution.