Features: PH electrode has single cylinder, allowing direct connection of pH meter, controller, or input terminals of any pH devices with BNC input terminals. The accurate and reliable pH electrode probe can provide an almost instantaneous reading to help you re-check the water quality, provides more reliability. Standard BNC connection, suitable for most pH meter and controllers. Made of quality materials, durable for long term use. Widely used in aquariums, horticultures, fish tanks, hydroponics, laboratories and other industries. Specifications: Material: ABS+Printed Circuit Board Type: Non-rechargeable, Rechargeable(optional) PH value range: 0-14PH Temperature range: 0-60 Working-voltage: 50.2V (alternating current and direct current) Working current: 5-10mA Detectable concentration range: PH0-14 Detection temperature range: 0-80 Response-time: 5S Settlement-time: 60s Component power: 0.5W Operating temperature: -10~50 (nominal-temperature: 20 ) Humidity: 95% relative humidity (nominal-humidity 65% relative humidity) PH test module size: Approx. 42x32x20mm/1.65x1.25x0.78" Output: analog-voltage signal output With 4pc M3-mounting hole Note: NO Model: use non-rechargeable PH probe. YES Model: use rechargeable PH probe. Please allow 0-1cm error due to manual measurement, make sure you do not mind before you order. Please allow for slight color difference due to different monitor resolutions. Package includes: 1x PH Electrode Probe BNC Interface 1x PH0-14 Value Test Sensor Module