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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.
Operating Pressure: 1=0.5mbar-30mbar; 2=0.2mbar-5.0mbar
Connection: 1=accept 0.25"OD rigid or semi-rigd tubing;2=Male 0.25" silp-on connectors,suitable for flexible tubing
Mounting/Fixing: A=Bracket A; B=Bracket B
Wire Protecting: 0=None; 1=with protecting on closure
| Model | LF35-1 | LF35-2 |
| Media | Air | |
| Mounting Position | Diaphragm in any vertical Plane | |
| Field Adjustable Range | 0.5±0.05mbar to 30.0mbar | 0.2±0.05mbar to 5.0mbar |
| Switch Differential | Progressive, increasing from approximately 0.05mabr at minimum set point, to approximately 2.0mbar at maximum set point | Progressive, increasing from approximately 0.05mabr at minimum set point, to approximately 0.25mbar at maximum set point |
| Maximum Pressure | 30mbar | |
| Operating Temperature | -40℃~+82℃ | |
| Electrical Rating | 300VA pilot duty at 115-277VAC, 10A, non-inductive, 277AVC | |
| Connection | Ferrule and nut compression type connectors that accept 0.25"OD rgid or semi-rigid tubing; male 0.25"slip-on connector | |
| Contact Arrangement | SPDT | |
Conversion: 1mbar=100Pa 1" W.C=249Pa
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