Siemens OP121 Photoelectric Smoke Detector.
Model OP121 from Siemens ─ Fire Safety is a photoelectric smoke detector with microprocessor-controlled, self-diagnostic circuitry, eliminating the need for burdensome sensitivity test equipment.
Model OP121 also comes with a new magnet-test feature. 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).
The auto-sensitivity feature for Model OP121 stems from the internal self-monitoring circuitry and provides dynamic verification of sensitivity and/or required maintenance.
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.
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