Orion Fans’ AFM Series of air flow monitors offers a cost-effective solution for indicating positive or negative airflow in maintenance and repair applications.

The AFM Modules are retrofittable for both AC & DC fan and blower applications and feature an optical LED or audible alarm for signaling. They can be mounted to the front of the fan to measure positive airflow, and to the intake side to measure negative airflow

A bi-directional switch activates an electrical contact if the airflow falls below 8.2 feet per second, turning the signaling device on or off. Available in 8 different models, Orion Fans’ AFM series operates with or without fan filters and can be purchased already assembled to a grill or sold separately.