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Description : PH Electrode Probe BNC Connector for Aquarium PH Control Meter Sensor BNC Connector suitable for most pH meter and controller. Suitable for wide range of application : Aquariums, Hydroponics, Laboratory etc. This pH electrode has a single cylinder that allows direct connection to the input terminal of a pH meter, controller, or any pH device which has a BNC input terminal. The pH electrode probe is accurate and reliable that can gives almost instantaneous readings, helping you to check the quality of your water time and time again. Specification : Terminal Blocks : BNC plug Measurement range : 0.00 - 14.00 PH Zero-point : 7 0.25 PH Alkali Error : 0.2PH (25) Theoretical Percentage Slope : 98.5% Internal Resistance : 250M (25) Response Time : 2S (25) Operating Temperature : 0 - 60C Cable length : Approx. 80cm Package includes : 1 x PH Electrode Probe BNC Connector 1 x Injector Comes with the filling solution for you : ) Details pictures : (Inside is 3.3 mol/KCL powder, add 10 ml of pure water in shake, after the powder dissolves, can be used as electrode filling liquid or soaking liquid)