4. Battery and automatic function error prevention system (BEPS) can extend battery life and prevent false readings. 2. Portable multifunctional water quality meter, suitable for swimming pool, breeding, laboratory, etc. 1. 4‑digit LCD switch display, can measure PH, temperature, ORP value of a water at the same time. 3. Complete functions, high accuracy, with microprocessor‑based meters, which can improve speed and accuracy. 5. Use three memory buffers for automatic calibration, easy to use. , portable and compact, easy to carry., Manufacturer: Akfldms