Lau’s flow duct smoke detector is designed for use with Lau UL Classified Smoke and Fire/Smoke Dampers. The device detects the presence of smoke in the airstream of ductwork in HVAC systems operating at no less than 300 fpm.
Flow rated duct smoke detectors are factory mounted for “single point field power connection” to a standard Lau electronic fuse link (EFL) or optional FireStat (TS150).
The DSDF factory mounted with a smoke rated damper is intended to close the damper only. The DSDF can be field wired back to a UL listed fire alarm panel by others.
Flow Duct Smoke Detector Catalog