yieryi ORP Replacement Probe Aquarium Hydroponic Laboratory Electrode Oxidation-Reduction Potential Test BNC Q9 Connector The combined electrode is composed of platinum needle indicating electrode and silver-chlorinated silver reference electrode. It is the measuring element of ORP meter & water quality tester, using to measure the ORP of aqueous solution/water. 【Multifunctional ORP Probe】: Widely used to test the the ORP of aqueous solution/water. Great laboratory ORP electrode probe. Suitable for most ORP meter and controller with BNC Q9 connector. Filled with saturated kcl colloidal 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, koi fish ponds, but also for water sources, aquariums, hydroponics, laboratories, seawater, marine/saltwater fish tanks and other water systems. 【Specifications】 : 1. Type: ORP-101 2. Material: PC 3. Type: Laboratory Electrode 4. Probe Type: Sensitive Crystal Ball Bubble 5. Range: 0 ~ ±1999mV 7. Accuracy: ±5mV 8. Applicable Temperature Range: 5 ~ 70℃ 9. Electrode Potential: 245-270mv (15~30℃) 10. Internal Resistance of the Reference Electrode: ≤10kΩ 11. Electrode Stability: ±8mv/24 12. Indicator Electrode of Electrode: Good Conduction 13. Type of Electrode Plug: Q9 14. BNC: Upright 15. Length of pH Electrode Line: Approx. 70cm / 27.5in 16. Item Size: Approx. 155 * 20 * 20mm / 6.1 * 0.8 * 0.8in (ORP Electrode) 17. Item Weight: Approx. 49.6g / 1.8oz 18. Package Size: Approx. 18 * 4.5 * 2.3cm / 7.1 * 1.8 * 0.9in 19. Package Weight: Approx. 75g / 2.6oz 20. Package List : 1 * ORP Electrode 【Suitable for Swimming Pool ORP Probe】: The World Health Organization recommends in the "Guiding Principles of Swimming Pool Water Environment": in a chlorine disinfection pool, when pH=6.5-7.3, the ORP is 750mV; when pH=7.3-7.8, the ORP is 770mV or more, which can meet the disinfection effect. 【Aquarium and fish tank measurements for sea and fresh water】: The ORP value of the freshwater aquarium is about 230mV~260mV, and the ORP value of the seawater fish tank is about 350mV~450mV. 【Drinking Water for Health】: The ORP value of tap water is between +150mV and +550mV; The ORP value of ionized water showed lower and negative values, while the ORP value of ordinary water was higher, and the ORP value of soft water was the highest. Waterniser ORP values range from -70 to +70 tap water ORP values range from +150 to +550. We all know that negative ions are good for the human body, because negative ions can help the human body to remove harmful oxides, phosphonates, nitrites, heavy metals and sexual metals. These substances are the main substances that cause tumors. Brand Story World Love, China Made YIERYI brand was registered in 2016. The main products are refractometers, PH meters, tds, ec pens, soil meters, kitchen scales, and jewelry scales. In order to ensure the accuracy of the data, we gave up the low-cost chip, selected high-precision Taiwan imported and South Korea imported chips, the design chose a portable pen-type design, light, beautiful, and easy to carry. All products will be tested, calibrated and used by ourselves to ensure that the quality is qualified and then promoted. We want to let this healthy brand enter every family and every corner of the world, and pass on the dream of " World love, China Made "