System Sensor 2100S Fire Alarm Photoelectric Smoke Detector Head
System Sensor 2100S Fire Alarm Photoelectric Smoke Detector Head
Condition: Used
[Standard Used Item Notes] This item is USED. Only the components visible in the photographs or explicitly mentioned in the listing are included. Peripheral accessories (such as keys, bases, mounting hardware, etc.) are not included unless otherwise stated. The item in the photograph may not be the exact one you receive; however, we strive to portray the average condition of all items accurately. Please carefully review this listing and its photos to assess the condition and contents. If you have any questions or require additional details, feel free to message us, and we will be happy to assist you.
Low stock: 3 left
Storewide Quantity discount: Save 5% on 2 items, 8% on 3 items, and 10% on 4+ items (applies automatically at checkout).
Couldn't load pickup availability
You will be prompted to create an account or sign in to complete your purchase.
As an eBay Partner, we may be compensated if you make a purchase.
System Sensor 2100S Fire Alarm Photoelectric Smoke Detector Head. This advanced sensing solution utilizes high-precision photoelectric technology to provide reliable fire detection in commercial environments. - 24V DC operating voltage - 0.5% to 4.0% per foot sensitivity range - 360-degree viewing angle for LED status indicator - 4-inch base diameter compatibility - 2.0-ounce lightweight sensor housing. By refining the detection algorithms found in earlier legacy models, this unit offers improved immunity against false alarms while maintaining rapid response times consistent with modern life-safety industry standards.
Advanced Detection Engineering and Operational Efficiency
The 2100S series incorporates sophisticated light-scattering chambers designed to identify smoldering fires with greater accuracy than traditional ionization-based devices. This unit ensures seamless integration into existing fire alarm control panels, providing facility managers with a robust, low-maintenance approach to building security without compromising on detection speed or reliability.
This item description was generated using artificial intelligence and may contain errors. Specifications and compatibility should always be verified using official manufacturer documentation and, where applicable, by a qualified or licensed fire alarm technician.
View full details

About us
We specialize in new, used, and surplus fire alarm and life-safety equipment. Our inventory includes control panels, modules, power supplies, annunciators, detectors, and related accessories from leading manufacturers. Listings reflect current, in-stock availability and are updated regularly. Orders ship quickly and are packed with care.
For additional details, please review our Terms of Service, Shipping Policy and Refund Policy before placing your order. Please contact us with any questions.