Replacement ORP testing probe for water testing Designed to measure the oxidation-reduction potential ORP in different water sources, this replacement probe provides accurate readings and serves as a reliable replacement part for ORP measurement systems. Strong conductivity Constructed from robust materials to deliver high conductivity for reliable ORP measurements and stable performance over time. BNC Q9 connector compatible Compatible with ORP meters and controllers that use BNC Q9 connectors. Suitable for use in aquariums, hydroponics, swimming pools and other water systems. pH measurement capability When used with a pH meter, this probe enables precise measurement and adjustment of pH in aqueous solutions. Applications - Aquariums: monitor ORP to support fish and coral health and water quality. - Hydroponics: track ORP to maintain appropriate oxidation levels for root zone activity. - Swimming pools: monitor sanitizer efficacy and water safety through ORP readings.