The encompassing result is an intelligent detector that provides enhanced detection capability to a wide range of products of combustion – while offering unsurpassed rejection to nuisance-alarm sources, including: dust | steam | cooking aerosols and other deceptive phenomena that could cause false alarms. It is known at Siemens as the “No-false-alarm guarantee”.
Since Model OOH941 is a two-wire, addressable device, functioning as a multi-purpose detector – satisfying the revised requirements of UL 268 7th edition using smoke-and-heat detection in a singular, aesthetically pleasing package. Comparable to other multi-functional detectors, Model OOH941 also serves as a very cost-effective, viable detection solution that saves on product | installation | maintenance costs. The unit’s value is multiplied with built-in ISOtechnology the True Class-X - NFPA 72 compliant SLC isolation feature supporting up to 252 isolation ready devices per loop. When used in mixed mode a maximum of 30 non-isolated devices between isolation devices (wired in polarity-insensitive mode). Each detector fits into one (1) wall-or-ceiling footprint, and only occupies one (1) address on the signal-line circuit (SLC).
A patented forward-and-backward, light-scattering technology, which is able to distinguish both small and large products of combustion, operates at the core of each Model OOH941 intelligent, addressable detector. Each Model OOH941 detector provides an eco-friendly solution to legacy ionization detectors - eliminating the need for a radioactive source, along with inevitable HAZMAT-disposal requirements. Therefore, each detector is capable of detecting both smoldering and flaming fire ─ all in ecologically efficient manner ─ and is a valid, RoHS-compliant (Restriction of Hazardous Substances) detection alternative to legacy ionization detectors.
Two (2) thermal sensors make each Model OOH941 detector a robust, reliable device suitable for the most challenging applications. Additionally, Model OOH941 works as a heat detector, compliant with NFPA 72 and UL 521.