LSP Series Air Flow Switch for HVAC Ducts

KOBOLD LSP air flow switches are widely used to control air flow setpoints in HVAC duct applications. The principle of operation is quite simple. Air flow exerts a force on a paddle, actuating a dust-tight SPDT micro switch. 

The switching point may be adjusted continuously within a wide range, making the LSP useful in a wide variety of applications. The flow switch is factory set to switch at 195 FPM. 

To handle air velocities greater than 920 FPM, the paddle may be cut at a pre-calibrated mark. This automatically changes the factory setpoint to 490 FPM.