> Replaceable ORP electrode with 50 ohm BNC socket connector. and protective cap -1999 ~ 1999 mV Measuring range and accuracy of ±0.1% F · S ±1 digit With an extra-long 300 cm cable, ideal replacement probe for ORP meter, ORP controller or any ORP device with a BNC input terminal The best tool for general water applications such as drinking water, domestic and rainwater, aquariums, tanks, ponds, swimming pools, spas, etc. Comes with a protective case Product Description Replaceable ORP electrode Provides instant ORP measurement Comes with protective cap to ensure the safety of the bulb Reliable, stable and portable Simple and comfortable to install and use High and accurate measurement