Rugged and cost effective, the LPS airflow switches are widely used to control flow setpoints in HVAC applications. Touted as being quite simple in operation, airflow exerts a force on a paddle, actuating a dust-tight micro switch. The switching point is continuously adjustable within a wide range, making the LPS useful for a large variety of applications. The instrument is factory set to switch at 195 FPM. To handle air velocities of more than 920 FPM, the paddle may be cut at a pre-calibrated mark. This automatically changes the factory set point to 490 FPM. For more details and specs, a datasheet is available at http://koboldusa.com/sites/default/files/product_files/HVAC-Air-Flow-Switch-KOBOLD_0.pdf
Kobold Instruments Inc.