AIR PRODUCTS AND CONTROLS Duct Smoke Detector: 115V AC/230V AC/24V AC/24V DC Volt, Light Alert
The AIR PRODUCTS AND CONTROLS SM-501-P is a UL 268A-listed duct smoke detector for fire alarm systems, featuring a photoelectric sensor and a light alert in a rectangular, gray body. It operates on 115V AC/230V…
SKU 3G-OTH-546839
Need installation or engineering help?
Ask a question
Product Description
The AIR PRODUCTS AND CONTROLS SM-501-P is a UL 268A-listed duct smoke detector for fire alarm systems, featuring a photoelectric sensor and a light alert in a rectangular, gray body. It operates on 115V AC/230V AC/24V AC/24V DC power with a current rating of 56 mA @ 24V AC, and is hardwired for duct mounting.
Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.
Frequently Asked Questions
What is the AIR PRODUCTS AND CONTROLS SM-501-P duct smoke detector used for?
The SM-501-P is a UL 268A-listed duct smoke detector designed for fire alarm systems. It uses a photoelectric sensor to detect smoke in HVAC ducts, triggering a light alert. This helps prevent smoke recirculation and supports early warning in commercial and industrial buildings.
What are the specifications of the AIR PRODUCTS AND CONTROLS SM-501-P?
The SM-501-P operates on 115V AC, 230V AC, 24V AC, or 24V DC with a current rating of 56 mA @ 24V AC. It features a photoelectric sensor, light alert, rectangular gray body, and is hardwired for duct mounting. It complies with UL 268A standards.
Where to buy the AIR PRODUCTS AND CONTROLS SM-501-P worldwide?
3G Electric supplies the AIR PRODUCTS AND CONTROLS SM-501-P duct smoke detector worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this UL 268A-listed unit.
How to install the AIR PRODUCTS AND CONTROLS SM-501-P duct smoke detector?
Install the SM-501-P in the duct with the airflow arrow pointing downstream. Hardwire to the appropriate voltage (115V AC, 230V AC, 24V AC, or 24V DC) per local codes. Ensure the photoelectric sensor is clean and unobstructed. Test the light alert after installation.
AIR PRODUCTS AND CONTROLS Products
3G Electric supplies AIR PRODUCTS AND CONTROLS smoke detectors for fire alarm systems. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.




