Description
The Siemens DI-B3 fire smoke detectors operate on the ionization principle. The detectors respond to the first traces of fire in the form of visible smoke or invisible products of combustion. The DI-B3 has been developed for a wide range of commercial, industrial and institutional fire detection and extinguishing applications. The DI-B3 are approved in environments covered by UL 268 & UL 268A. The DI-B3 must be utilized with a Series 3TM air duct housing.
