Overall, the Siemens OP121 Fire Safety is a photoelectric smoke detector with microprocessor-controlled, self-diagnostic circuitry, eliminating the need for burdensome sensitivity test equipment. Also, the Siemens OP121 Photoelectric Smoke Detector also comes with a new magnet-test feature. Besides, the magnet-test feature allows installers and test personnel to prove the integrity of the wiring and proper connection to the fire alarm control panel (FACP).
In general, the auto-sensitivity feature for Siemens OP121 stems from the internal, self-monitoring circuitry, and provides dynamic verification of sensitivity and/or required maintenance. Furthermore, the auto-sensitivity feature is displayed by Siemens Fire Safety’s unique (3) three-color light-emitting diode (LED); provided locally on the detector ─ and optionally with the various remote LED indicators.
Features / Specifications
- Magnet-test feature
- Incorporates one (1) state-of-the-art chamber for rapid, uniform response to alarm criteria
- Automatic sensitivity test without the need for a special tester (per NFPA 72)
- Available optional sounder base, providing an alert and evacuation signal
- UL 268 Listed [for open-area protection], UL 268A Listed [for direct in-duct use], ULC 529 Listed; FM, CSFM Approved