... 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 ... , ABS, fire retardantor PC coverProtection IP65Color WhiteWeight 0.7KgMore... air flow proof control