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The System Sensor DNR Duct Smoke Detector is a high‑performance fire safety device engineered to detect smoke within HVAC ductwork, providing early warning of fire conditions in industrial, commercial, and institutional buildings. Designed for integration with fire alarm and building management systems, this duct‑mounted detector enhances overall safety by monitoring airflow spaces that are otherwise difficult to inspect, enabling rapid response to fire and smoke infiltration through ventilation systems.
Key Features:
Duct‑mounted smoke detection for HVAC systems and air handling units
Sensitive and reliable smoke sensing to protect building occupants and equipment
Designed for use with conventional and addressable fire alarm control panels
Rugged construction for long‑term performance in industrial and commercial environments
Enhances early fire detection in ventilation and air distribution pathways
Specifications:
Model: DNR (Duct Smoke Detector)
Brand: System Sensor
Function: Smoke detection within HVAC ducts and ventilation systems
Industrial Applications: Commercial buildings, industrial facilities, institutional sites
Installation: Duct‑mounted with sampling tubes and airflow compatibility
Compatibility: Conventional and addressable fire alarm systems
The System Sensor DNR Duct Smoke Detector provides dependable, early warning smoke detection in ductwork, making it an essential component of comprehensive fire safety, HVAC protection, and building monitoring systems.
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
