The HM PH-80 waterproof digital water tester simultaneously measures pH value and water temperature with built-in ATC automatic temperature compensation to eliminate reading errors caused by liquid temperature changes. It covers 0.0–14.0 pH and 1–80℃ temperature, with 0.1 high resolution and ±0.2 pH precision for reliable daily testing.

Equipped with a dual-display large LCD screen, it shows pH and temperature data at the same time, plus data hold function to lock readings for easy recording. One-touch automatic calibration supports pH 4.0/7.0/10.0 buffer powders, and the transparent protective cap with moisturizing sponge well protects the glass electrode to extend service life.

Water-resistant pen-shaped lightweight design allows direct immersion testing, with auto power-off and low battery reminder for energy saving. Widely applied to hydroponics, aquariums, swimming pools, drinking water and laboratory liquid analysis, it is an affordable portable pH monitoring tool for all water testing demands.