Waterproof pocket pH tester, 1 to 3 points calibration, setup menu contains 5 options, suitable for measuring the pH of liquids in test tubes and small-neck containers, accuracy 0.01 pH.
High-performance portable pH meter for measuring solid, semi-solid and viscous samples, 1 to 3 points calibration, setup menu contains 7 options, accuracy 0.01 pH.
High-performance portable pH meter for piercing and measuring soil and other soft solids, 1 to 3 points calibration, setup menu contains 7 options, accuracy 0.01 pH.