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Universal Security Instruments

Model # MDSCN111

Internet # 203672641

Store SKU # 1000048211

AC Hardwired Iophic Smoke/Fire Carbon Monoxide and Natural Gas Alarm with Battery Backup

This item has been discontinued.
The Home Depot no longer carries this specific product.

$47.97 /  each


Model # MDSCN111

Internet # 203672641

Store SKU # 1000048211

Universal Security 4-in-1 Smart Alarm uses a single sensor to detect both CO and Natural Gas and protects against both fast flaming and slow smoldering fires. Microprocessor Intelligence provides superior nuisance alarm resistance, along with temperature and humidity compensation, self-diagnostics and Quick find alarm origination features. Perfect for new or replacement installations. This 120 Volt AC/DC hardwired 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
  • Interconnect able up to 24 compatible devices
  • Loud 85 dB alarm
  • 7 year limited warranty

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Alarm Type 
Carbon Monoxide,Natural Gas,Smoke 
Alarm/Detector Features 
Adjustable Sensitivity,Battery Back-Up,Hush Feature,Interconnected,Tamper Resistant 
Battery Back-Up 
Commercial / Residential 
Connector/Contact Type 
Power Source 
Voltage (volts) 
Warranty / Certifications
Certifications and Listings 
1-UL Listed 


Rated 3.7 out of 5 by 3 reviewers.
Rated 1.0 out of 5.0 by False alarms I bought two of these to replace my hard-wired smoke detectors; I installed one on each floor. Within a couple of weeks the upstairs one started to beep. This leads to the next problem.... You have to look through a 21 row table in the instructions to determine what it is trying to signal. Was it 3 beeps, 2 second pause, repeat or was it 4 beeps, 5 second pause, repeat? Also, you must check which LED is lit or off or blinking. So you look in the instructions for an illustration of the layout of the LEDs. Nope, there isn't any. I don't know about other people, but I cannot read the small plastic molded letters on the detector when it is mounted on the ceiling. So I get a ladder and climb up to determine which LED is which. After all that, I determined It was signaling a CO problem. However, the four other CO detectors in the house were silent - two CO detectors had a digital readouts of zero. I swapped the upstairs and downstairs detector, and within a few weeks, beeping again. Same procedure of looking through the instructions and getting out the ladder. This time it was signalling a GAS problem. I didn't smell the distinct odor of gas, so I swapped the detectors again. No beeping for either detector after the swap. Now, the problematic detector is upstairs again and within a few weeks it is beeping again. Same CO alarm and the other CO detectors in the house are silent. This detector is going in the trash. Two detectors, with one turning out to be problematic. 50% is not a good indicator of quality for me. May 25, 2015
Rated 5.0 out of 5.0 by smoke alarm Easy to install hookedad into my old wiring, on new connectors needed April 21, 2015
Rated 5.0 out of 5.0 by Iophic Smoke/Fire Carbon Monoxide Detector Kind of hard to review this product without having an actual disaster. Luckily I haven't had one to test these out, knock on wood. My original smoke detectors started failing after 15 years so I replaced them all with the Iophic Smoke and Carbon Monoxide detectors. I was going to go with another brand but as I was looking at the other brand they had a recall so I purchased the Iophic. Replacement was easy. My original detectors were smoke only and I live in a state that mandates carbon monoxide detectors in every home so I got these dual purpose ones. So far so good. December 12, 2014
  • 2015-06-01T11:03:58.883-05:00
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