Economical pocket pH tester, 2 points calibration, suitable for measuring the pH of non-viscous and non-high temperature liquids, accuracy 0.05 pH.

Economical flat surface pH tester, 2 points calibration, suitable for measuring the pH of semi-solid, gel and viscous samples, accuracy 0.05 pH.

Economical hydroponic pH tester, 2 points calibration, suitable for measuring the pH of liquids in small containers, accuracy 0.05 pH.

Waterproof pocket pH tester, 1 to 3 points calibration, setup menu contains 5 options, suitable for measuring the pH of common aqueous samples, accuracy 0.01 pH.

Waterproof pocket pH tester, 1 to 3 points calibration, setup menu contains 5 options, suitable for measuring the surface pH of semi-solid, gel and viscous samples, accuracy 0.01 pH.

Waterproof pocket pH tester, 1 to 3 points calibration, setup menu contains 5 options, suitable for piercing and measuring the pH of soil, food, fruit pulp and soft solids, accuracy 0.01 pH.