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. Specifications: PH range: 0-14 PH Temperature range: 0-80 Heater voltage: 50.2V Working current: 5-10mA Zero-point: 7 0.25PH Alkali Error: 15 mv Sedimentation time: 60S Power: 0.5W Response Time: 5S Suitable for wide range of application: Aquariums, Hydroponics, Laboratory etc. Module size: 42*32*20mm Package size: 25*9*4cm Package weight: 145g Package List: 1 * PH0-14 Value Detect Sensor Module 1 * PH Electrode Probe 1 set of screws 1 * User manual