PH0-14 Value Detect Sensor Module + PH Electrode Probe BNC with Cable PH Value Detector for Aquariums, Hydroponics, Laboratory Features: PH electrodes are used in PH meters and testers to measure the acidity or alkalinity of a substance. The PH electrode probe is accurate and reliable that can gives almost instantaneous readings. PH range: 0-14 PH;Temperature range: 0-80℃;Zero-point: 7 ± 0.25PH. Suitable for wide range of application: Aquariums, Hydroponics, Laboratory etc. With long cable for reaching samples, easy to use. 1pcs Liquid PH0-14 Value Test Sensor Module; 1pcs PH Electrode Probe Hydroponic Sensor.