Siemens OOHC740 Fire and Carbon Monoxide Detector

The Siemens OOHC740 (Part Number: S54320-F8-A1 / Cerberus PRO / Desigo CC series) is an advanced multi-criteria addressable detector engineered by Siemens Building Technologies for critical commercial, institutional, and life-safety applications. Integrating dual optical light-scattering smoke sensors (forward and backward scattering), an electronic thermal thermistor, and an electrochemical carbon monoxide (CO) sensor within a low-profile housing, the device evaluates fire and toxic gas phenomena simultaneously. Powered by Siemens’ proprietary ASAtechnology (Advanced Signal Analysis) neural algorithms, the detector dynamically correlates smoke density, temperature shifts, and CO concentration levels. This multi-sensor fusion provides fast detection of open flaming fires, slow smoldering blazes, and toxic CO leaks while delivering unmatched immunity to deceptive false alarm sources like steam, exhaust, or dust. Operating on Siemens C-NET / FDnet addressable loops, it features field-selectable parameter sets, integrated loop short-circuit isolation, independent CO life-safety alarm channels, 360-degree LED status indication, and full VdS, LPCB, EN 54, and EN 50291 approvals.