... flow rate Water Flow Sensor1. Synchronous activation of water pump.2. Activate water heater.3. Monitor water flow ( ... 1. Mass production, competitive price.2. Tap water or oil applied, without using filters.3. ... -15L/MIN.6.Obstruction of the liquid is small, high effciency . Caliber size:1/4`` ... 9-220VMax switch current :0.5AProduct application:water ,oil,othersWorking temperature rating :T1:-40~120Lowest ...