Waterproof pocket pH tester, 1 to 3 points calibration, setup menu contains 5 options, suitable for measuring the pH of liquids in small containers, accuracy 0.01 pH.
Economical portable pH meter with mV measurement mode, 1 to 3 points calibration, automatic temperature compensation, setup menu contains 7 options, accuracy 0.01 pH.
Professional portable pH/ion meter with pH, oxidation-reduction potential and ion concentration measurement modes, setup menu contains 12 options, accuracy 0.002 pH.