Established 1997


Gentex Hard Wired Ceiling Mount T3 Smoke Alarm with Backup

item #: 74052

sku : GEN-7139CSC

brand : Gentex

Gentex Hard Wired Ceiling Mount T3 Smoke Alarm with Backup

List price: $149.00

Quick Overview

  • Hard Wired Electrician Installation
  • 177 candela rating (very bright strobe light)
  • Solid state 90dB horn (very loud)
  • Tandem connection up to 6 detectors per system


The Gentex 7139 for ceiling mount is a photoelectric single station smoke alarm designed to give reliable early warning of the presence of smoke where both audible and visual alarms are required. This model is hard-wired so you would need an electrician to hook it up.

The smoke alarm operates on the light scattering principle, a superior method of detection in smoldering fires. It has a pulsing LED light source and a photodiode sensor with a fully screened sensing chamber. When smoke enters the chamber the infrared beam is deflected onto the sensor. The LED rate increases to 8 times the normal pulse rate and after the photodiode confirms the presence of smoke for 2 consecutive pulses it will produce the signal necessary to trip the audible and strobe light alarms. The 7139 series provides the temporal 3 (T3) evacuation tone as a standard feature. When testing it may take up to 16 seconds longer to go in or out of alarm.


  • Flashes 60 times per minute
  • Tandem connection up to 6 detectors per system
  • Mounting hardware for ceiling
  • Full function test switch (easy for you to test that it is working)
  • 9V battery backup (audible alarm only)
  • Meets state federal and ADA requirements
  • UL Listed (USA)
  • Temporal 3 (T3) Evacuation sounding device (3 beeps pause 3 beeps pause)


Product Weight 2 lbs.
Warranty One year limited warranty

Customer Reviews


Return Policy

If you are not 100% satisfied with your product, we offer a full refund (on most products, see below).
To qualify for a return please note the following:

  • Product must be clean, unused and in its original packaging.
  • Return shipping costs are the responsibility of the customer
  • Items must be returned within 30 days

You must have a return authorization number to qualify for a return:
Please call us at 1-800-320-7140 Monday - Friday 9am to 5pm EST to obtain a return authorization number and a return address. Returns may not be sent to our corporate address

Full Refund

We offer full refund on all:
  • Transport chairs
  • Standard manual wheelchairs
  • Light weight manual wheelchairs
  • Folding ultralightweight wheelchairs* (except for the 9000, etc)
  • Recliner wheelchairs
  • Heavy duty transport wheelchairs
  • Walkers
  • Rollators
  • Wheelchair accessories (bags, ramps & attachments)

10% Restocking Fee

There is a 10% restocking fee on all:
  • Electric Wheelchairs
  • Electric Scooters
  • Heavy duty wheelchairs
  • Volume sales
  • Karman products

15% Restocking Fee

There is a 15% restocking fee on all:
  • Lift chairs
  • Patient Lifts

Sorry, No Returns

We cannot accept returns on all:
  • Hospital beds
  • Mattresses
  • Ultra lightweight ridged frame wheelchairs
  • Custom wheelchairs
  • Court wheelchairs
  • Sport wheelchairs
  • Built to order items
  • Wound care
  • Wheelchair scales
  • Wheelchair Cushions
  • Back Cushions
  • Tempur-Pedic cushions
  • Invacare 9000 series reclining wheelchairs
  • Incontinence Products
  • Nutritionals
  • Bath Safety products
  • Adaptive Strollers
  • Harmar Products

Open Box Specials

  • Open Box Specials are new products that were ordered incorrectly or may have slight imperfections. These Specials are non-returnable and do not include any in-home service.

Refused Deliveries/Packages

  • If packages are refused at the point of delivery, you will be responsible for the return shipping.