The Analog Liquid Ph Meter Sensor Module is commonly used in water quality monitoring. PH stands for potential of hydrogen. It determines if a liquid solution is acidic or basic. This module works on a 5V system, its analog output will depend on the Ph level of the liquid where the probe are currently submerged. It can detect in a range of 0 - 14 Ph level. It requires at least a minute heating time to stabilize the outputs. Technical Specifications Heating voltage: 5+-0.2V Working current: 5-10mA Detection concentration range: PH 0-14 Detection temperature range: 0-80 °C Response time: 5S Stabilization time: 60S Component power consumption: 0.5W Working temperature: -10~50°C (nominal temperature 20°C) Working humidity: 95% RH (nominal humidity 65% RH) Service life: 3 years Size : 42mm x 32mm x 20mm Weight: 25g Output mode: analog voltage signal output