IP54 Air Flow Switch Duct Installation For Air Conditioning Description LQY Series Liquid Flow Switches for Piping in Industrial Plants: Heating, Air Conditioning, Refrigeration Systems and Heat Pumps Feature LQY series liquid flow switch is used to monitor the flow change Renovated SPDT micro-switch ensure the reliable switch function Max temperature of medium 120℃ Liquid pressure up to 1Mpa 3 stainless steel blades for diameter of 25-75mm pipeline 6 additional blades for