Item Name: Liquid Hydroponics BNC Connector For Aquarium PH Electrode Probe PH Controller. Terminal Blocks: BNC plug Zero-point: 7 +- 0.5PH Theoretical Percentage Slope: 98.5% Measurement range: 0.00~14.00 PH Cable length: Approx. 70cmAlkali Error: 0.2PH Internal Resistance: 250M Operating Temperature: 0-60C Response Time: 1min Feature:BNC connector, suitable for most pH meter and controller with BNC connector. Suitable for wide range of application: Aquariums, Hydroponics, Laboratory etc. Packing List: 1 x pH Electrode Probe *Please make