Universal Security Instruments Plug-In Combination Carbon Monoxide and Natural Gas Alarm-MCN400B - The Home Depot

Universal Security Instruments

Model # MCN400B

Internet # 203367044

Plug-In Combination Carbon Monoxide and Natural Gas Alarm

Universal Security Instruments Plug-In Combination Carbon Monoxide and Natural Gas Alarm

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

$39.99 / each


Model # MCN400B

Internet # 203367044

Single Installation. Double Protection. This compact plug-in alarm is perfect for new or replacement installations. Dual sensing alarm—provides protection against 2 deadly household threats: Carbon Monoxide and Natural Gas. This alarm is suitable for installation in houses, apartments and mobile homes. Early warning of carbon monoxide, natural gas is best achieved by installing combination alarms on every level of dwelling, including basements. For maximum protection, install an alarm inside every bedroom, outside every sleeping area, and on every level of the dwelling. Universal Security Instruments—Always Working To Protect Your Family.

  • Backup battery provides protection even during a power outage
  • Three LED colors indicate status of power carbon monoxide and natural gas
  • Compact design covers only one outlet
  • Ideal for every room in your home
  • Plugs in to standard outlet, no additional mounting required
  • Fast and easy to install
  • Backup battery—provides protection even during a power outage
  • 9 Volt eveready alkaline battery included

Info & Guides

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Assembled Depth (in.)  5.0 in  Assembled Height (in.)  2.25 in 
Assembled Width (in.)  5 in  Coverage area (sq. ft) 
Product Depth (in.)  Product Height (in.)  2.25 
Product Width (in.) 
Alarm Type  Carbon Monoxide,Natural Gas  Alarm/Detector Features  Battery Back-Up,Hush Feature 
Calibration (% of LEL)  20.0  Connector/Contact Type  None 
Fixed or portable  portable  Gas(es) detected  Carbon monoxide 
Hazardous Code  null  Included  Batteries 
Minimum detection (ppm)  70.0  Power Source  Plug-In 
Response time (sec.)  240  Returnable  90-Day 
Voltage (volts)  120 
Warranty / Certifications
Certifications and Listings  1-UL Listed 


Rated 3 out of 5 by 2 reviewers.
Rated 5 out of 5 by Nice compact gas sensor The delivery was quick and well packaged. The unit is compact and not intrusive when you plug into your outlet, whether kitchen counter or any wall outlet. December 10, 2014
Rated 1 out of 5 by lemon Will be returning this item, as it beeps all the time, can't turn it off! October 20, 2014
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