This lightweight pen-style pH meter is a handy handheld tester for fast liquid acidity and alkalinity detection, covering the full 0.0–14.0 pH range. Equipped with a clear LCD display and built-in automatic temperature compensation, it eliminates temperature interference to deliver stable, accurate readings instantly. Simple two-point calibration ensures long-term reliable measurement with standard buffer solutions.

Ergonomic pocket-sized ABS body is easy to slip into pockets or tool bags for outdoor on-site testing. Auto power-off design effectively saves battery life for frequent daily use, and the replaceable glass electrode lowers long-term maintenance costs.

It works perfectly for aquariums, swimming pools, hydroponics, drinking water, wine brewing and school chemistry lab experiments. Far more precise than disposable test strips, this affordable portable pH tester is an essential water quality tool for aquarium keepers, home gardeners and amateur lab users.