You have no items in your shopping cart.

Call for Sales or Support:


Monday-Friday 8AM-8PM EST

Simplex 4098-9755 TrueAlarm Analog Addressable Duct Sampling Unit

19 in stock
90 Days
- +

Questions (2)

What if I need to return this?
All products are covered by our 90-day warranty and come with a prepaid UPS return label and RMA form. Returning products has never been this easy.
What if I need support?
Our friendly team is on hand with expert advice and assistance. Contact us Mon-Fri 8am-8pm by phone (888.303.2656), by email ( or using our online chat. Responses within 1 business day (if not sooner!)

Product Description

Detects the presence of smoke in air conditioning or ventilation ducts. For use with Simplex addressable fire alarm control panels.

Sampling tubes are installed into the duct and air is directed to a 4098-9714EA TrueAlarm photoelectric smoke detector mounted in the housing.

Additional Replacement Duct Detector Boards (565-831) sold separately.
Please note: All parts should be installed and tested by a certified fire alarm company.