... 2..quick respond,high accuracy 3.custom made available KAFS Air Flow Switchour most hot-sell products,high quality IP65,Germany ... quality standard!ApplicationControl and monitor liquid flow of boilers, pumps, etc., of heating, cooling, and air conditioning equipment.FeaturesRenovated SPDT micro ... Plate, ABS, fire retardantor PC coverProtection IP65Color WhiteWeight 0.7KgMore... air flow proof control