A key automatic calibration function with ORP buffer powder High precision (@ 25 ° C / 77 ° F): ± 2 mV ORP; ± 0.5 ° C Temp; Portable pentype design. Easy to use and instantly see the results. The waterproof rating IP65 is an international certification waterproof and dustproof. Dust intrusion protection, short-term immersion. Ideal tool for professional water level testing. Applies to water sources, aquariums, hydroponics, spas, swimming pools and other water systems.
