Product Details
The Siemens OH121 is a plug-in conventional Multi-Sensor Smoke Detector featuring photoelectric smoke sensor and heat (135F) sensor.
16VDC – 27VDC
COMPATIBLE BASES:
— DB-11 Low-Profile Surface-Mount Base
— DB-11E Smaller-Diameter Detector Base
Models DB-11 and DB-11E mount on a 4-inch square, octagon or single-gang electrical box