... 3.high sensitivity and precision 4.quick delivery water flow indicator,water flow detector,water flow switchGrooved type:ZSJZ/G 50 ... -250Specifications:1) Size: 50mm, 65mm, 80mm, 125mm, 150mm, 200mm2) Leakproof test pressure: 2.4Mpa3) Working pressure: 0.14-1.2Mpa4) Active ... -90s6) Switch volume: AC220V, 5A; DC 24V, 3A water flow indicator