The SD-651 is designed to meet the performance criteria designated by UL. Its sensing chambers are sealed against back pressure air flow, dirt, and insects.
The L-Series BZR is a red bezel for wall mount horns, strobes and horn-strobes. When ordering indicate the marking option –F FIRE, -AL ALERT, -AG AGENT, -EV EVAC, -F FIRE, -P PLAIN, -SP FUEGO, -PG FOG