1,Precision work: The ORP BNC tester is made of high-quality material, which is and has a long service life. 2,Easy to install and use: The BNC tester is easy to install and use, it can be used with ORP connector. 3,Quality service : If you have any questions about our products, please to contact us, we will provide you with the best service. 4,Replaceable ORP electrode with 50 ohm BNC socket and protective cap 5,Best tool for general water applications such as drinking, domestic and rainwater, aquariums, tanks, ponds, pools, spas, etc. Widely used to test the the ORP of solution/water. Great laboratory ORP electrode probe. Suitable for most ORP meter and controller with BNC Q9 connector. Filled with saturated solution, used for printing circuit board, ORP on line measurement of containing chromium wastewater treatment. Material is environmental friendly with no harm to human body and great conductivity. Mainly used to measure water quality, suitable for swimming pools and spas, fish ponds, but also for water sources, aquariums, hydroponics, laboratories, seawater, marine/saltwater fish tanks and other water systems. Probe Type: Probes Range: 0 - 1999mV Accuracy: 5mV Applicable Temperature Range: 5 - 70 Electrode Potential: 245-270mv (15-30) Internal Resistance of the Reference Electrode: less than equal 10k Electrode Stability: 8mv/24 Indicator Electrode of Electrode: Good Conduction Type of Electrode Plug: Q9 BNC: Upright Length of pH Electrode Line: . 300cm Colour:Photo Color Material:Plastic Package Contents: 1 x ORP Electrode Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.