... flow of boilers, pumps, etc., of heating, cooling, and air conditioning equipment.FeaturesRenovated SPDT micro switch ensures the reliable switch functionStainless steel paddleCut-in ... cut-out Min1.0m/sec, Max.8.0m/sec cut-in Min2.5m/sec, Max.9.20m/secFlow rate setting adjustment ... retardantor PC coverProtection IP65Color WhiteWeight 0.7KgMore... German standard Paddle type air Flow Switch