LEFOO ion in:mm The LF35 are general purpose airflow proving switches designed for HVAC, detection of blocked filters and fan suction, air flow monitoring in ducts, pipes, tunnels, and other energy management applications. It may be used to sense positive, negative or differential air pressure. LF35 Order Ref NO LF35-1 1A1 -P0.5mbar ABC D Pressure setting:P0.5mbar P=Positive;V=Vacuum A Operating Pressure:l = 0.5mbar-30mbar;2 = 0.2mbar-5.0mbar B Connection:l = accept 0.25MODrigidorsemi-rigdtubing;2 = Male0.25Msilp-on connectors,suitable for flexible tubing C Mounting/Fixing:A = Bracket A;B = Bracket B D Wire Protecting:0 = None;l = with protecting on closure Specification