Siemens (OP121) Photoelectric Smoke Detector


SKU: OP121

An conventional smoke detector that uses state-of-the-art microcontroller circuitry and surface-mount technology for maximum reliability.


Siemens Photoelectric Smoke Detector OP121

At Life Safety Consultants, we strive to only offer high-quality products when it comes to smoke detector replacement parts. That’s why we’re proud to introduce the Siemens Conventional Photoelectric Smoke Detector OP121 ( Siemens part#S54372-F1-A1).  Model OP121 is equipped with microprocessor-controlled, self-diagnostic circuitry, eliminating the need for burdensome sensitivity test equipment.  Order yours today and browse our website to learn more about our Siemens parts and accessories. For more details, get in touch with the Life Safety Consultants team at  (888) 557-0558 or email us at

Additional information

Weight.2 lbs
Dimensions4 × 4 × 2 in


Part Type

Photoelectric, Smoke Detector


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