0042741001090

Universal Security Instruments

Model MICN109

Internet #203672643

120-Volt AC Hardwired Ionization Smoke and Fire Carbon Monoxide and Natural Gas Alarm with Battery Backup

$37.37 /each
  • Working smoke alarms cut the risk of dying in a home fire in half
  • Natural gas leaks can be undetecable by the sense of smell alone
  • 9 out of 10 carbon monoxide incidents take place in the home

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Product Overview

Universal Security 3-in-1 Smart Alarm uses a single sensor to detect both CO and Natural Gas. Microprocessor Intelligence provides superior nuisance alarm resistance, temperature and humidity compensation, self diagnostics and Quick Find alarm origination features. Perfect for new or replacement installations, this hardwired 120-Volt AC/DC combination smoke and fire, carbon monoxide and natural gas alarm offers time-saving installation features, value and quality.

  • 120-Volt AC Wired-in
  • 9-Volt battery backup (battery included)
  • Microprocessor virtually eliminated nuisance alarms
  • Product end-of-life service warning
  • Test/reset button
  • Quick draw battery drawer
  • 4 LED's indicates power, smoke, co, and gas
  • Interconnectable up to 24 compatible devices
  • Tamper resistant locking feature
  • Battery activation pull tab
  • Loud 85dB alarm
  • 5 Year limited warranty


  • Click here for more information on Electronic Recycling Programs

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Customer Questions & Answers

5 Questions2 Answers

Customer Questions & Answers

120-Volt AC Hardwired Ionization Smoke and Fire Carbon Monoxide and Natural Gas Alarm with Battery Backup
120-Volt AC Hardwired Ionization Smoke and Fire Carbon Monoxide and Natural Gas Alarm with Battery Backup

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1 answer

Why are these not being shipped to California

This question is from 120-Volt AC Hardwired Ionization Smoke and Fire Carbon Monoxide and Natural Gas Alarm with Battery Backup
Asked by
Oakland CA
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May 6, 2016
Universal Security Instruments Model # MICN109 Internet # 203672643
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Answer (1)

June 22, 2016
Answer: 
Hi Jan, thank you for your recent inquiry with The Home Depot. Unfortunately, due certain regulations and restrictions put in place by your state we are unable to ship the 120-Volt AC Hardwired Ionization Smoke and Fire Carbon Monoxide and Natural Gas Alarm to California. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot.
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1 answer

2 wire connection

This question is from 120-Volt AC Hardwired Ionization Smoke and Fire Carbon Monoxide and Natural Gas Alarm with Battery Backup
Asked by
Deland FL
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January 15, 2016
The suggested replacement for the USI 7795 with a three wire connector is the MICN109 however the specifications of the connection indicates that it is a two wire. Do I need to make some wiring modification?
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Answer (1)

Asked by
Palos Heights, IL
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Home Improvement Profile: DIYer
August 9, 2016
Answer: 
Only if it is to be linked to other detectors.
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Can this combo unit take the place of an existing hardwired first alert fire only alarm?

This question is from 120-Volt AC Hardwired Ionization Smoke and Fire Carbon Monoxide and Natural Gas Alarm with Battery Backup
Asked by
Las Vegas
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August 22, 2016
I have replaced one of my hardwired fire units on my own with no problem; is the wiring the same with adapter or will i need an electrician to re-wire the unit or units?
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are these units NYC building code compliant ??

This question is from 120-Volt AC Hardwired Ionization Smoke and Fire Carbon Monoxide and Natural Gas Alarm with Battery Backup
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staten island NY
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February 28, 2016
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Customer Reviews

Rated 3.8 out of 5 by 13 reviewers.
Rated 1.0 out of 5.0 by skip it! after 3 days of purchase it just starts beeping...replace battery same issue. August 23, 2016
Rated 1.0 out of 5.0 by Failed in 18 mos, terrible manufacturers warranty The electrician helping with my basement remodel bought the detectors from Home Depot in Feb15. The Manufacturer wanted me to send the defective item with a check for $11 and then wait for them to send a replacement, not even specifying if it will be new or reconditioned. August 9, 2016
Rated 5.0 out of 5.0 by Just right Replacement for the one I had, which was only 6 years old since my house was built. This was easy to install, perfect fit to the existing wiring, and hasn't given me any problems. Now I want to replace my others so they all match. July 26, 2016
Rated 2.0 out of 5.0 by Replaced 3 of 4 I have 4 of these in my house, and my house is 16 month old. I have had to replace 3 of the 4 already as once they go they go out with the full squeal and there is no stopping it until you take it off and pull the battery out. They are easy to replace, but not sure why they malfunction so quickly. I have 6 more of the same brand in my house but they are fire protection only units. Not one of those has malfunctioned. All are hardwired. November 19, 2015
Rated 5.0 out of 5.0 by good product Works good!! Easy to check status.. What can I say more??? November 1, 2015
Rated 1.0 out of 5.0 by Two units failed within six months Purchased two units and both failed within six months of installation. Company offered replacement units but not a refund. Didn't want to keep installing these, especially on vaulted ceilings so decided to replace with Kidde KN-COPE-IC. June 8, 2015
Rated 5.0 out of 5.0 by Good smoke detector and a great price Ordered this unit to replace several in my home that started to fail. Worked as promised and tied into my existing system of smoke detectors December 23, 2014
Rated 5.0 out of 5.0 by Great buy, super price! Very easy to install and worked the first time. Was used to replace an older model but adapted as advertised. November 11, 2014
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