Universal Security Instruments Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup (MCN400B)

  • Universal Security Instruments Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup (MCN400B)
  • Universal Security Instruments Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup (MCN400B)
  • Universal Security Instruments Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup (MCN400B)
  • Universal Security Instruments Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup (MCN400B)
2-in-1 Plug-In | Smart Alarm
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Regular: $49.95
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Price: $37.96
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Quantity
  • 2-in-1 Carbon Monoxide and Natural Gas Alarm
  • 120-Volt AC Plug-In Alarm with Battery Back-Up
  • Back-up Battery Continues protection in the event of a power outage
  • 9-Volt Energizer Alkaline Battery Included
  • Power and Alarm LED's
  • Compact Plug-in Design
  • No Additional Mounting Required
  • Swift Installation Process
  • Microprocessor Software Eliminates Nuisance Alarms
  • 5 Year Limited Warranty
  • Meets New Laws & Legislations - This alarm exceeds industry standards, and is listed to UL Standard UL 217 and is California State Fire Marshal approved.
The USI Electric MCN400 Plug-In Carbon Monoxide and Natural Gas Smart Alarm is a 2-in-1 device that provides double the protection with a single installation. This dual-sensing alarm protects against two deadly household threats: carbon monoxide and natural gas (or methane). Perfect for new or replacement installations, the 120-volt AC alarm is suitable for houses, apartments and mobile homes. The compact plug-in design covers only (1) outlet for a fast and easy installation with no wiring required. This alarm features microprocessor intelligence to eliminate nuisance alarms, a single silence/test button to quiet a non-hazardous alarm and an end-of-service life warning that sounds when it's time to replace the battery (approximately 7 years from activation). Three LED colors display the status of the alarm, power, CO and gas in your home. The 9-volt alkaline battery (included) continues protection in the event of a power outage.

This alarm is ETL Listed to UL Standard 2034 & UL1484, California State Fire Marshal approved and Federal Housing Authority (FHA) approved to exceed industry standards. For maximum protection, install an alarm inside every bedroom, outside every sleeping area and on all levels of the dwelling. The USI Electric MCN400 Plug-In Carbon Monoxide and Natural Gas Smart Alarm comes with a 5 year limited warranty.


Recommended replacement for the following obsolete models:
- CD-9590

  • Warranty: 5 year Limited Warranty
  • Alarms Power Source: 120 volt (plug In & battery backup)
  • Alarm Sensor Type: Metal Oxide
  • Manufacturing Credits: ISO 9001 certified factory, UL listed & CSFM listed
  • Product Dimensions (W x H x D): 2.25 x 1.25 x 4.25 in.
  • Product Weight: 0.52 lbs.
Product Specs
UPC:
042741004008
MPN:
MCN400B
Write A Customer Review Review

5

Average score based on 10 reviews

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Very satisfied

Reviewed: 06/02/2020 by William Davitt

Works well and easy to use.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Carbon/gas detector

Reviewed: 01/06/2020 by Jacob Eddy

Works as advertised and shipped quickly

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5

Reviewed: 11/03/2019 by Porfirio De La Cerda

Very good

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Two ways

Reviewed: 09/24/2019 by Carol Wesley

I like that this device detects both CO and natural gas now that our home has changed from oil to gas heat. The back up battery is also a comfort.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Two ways

Reviewed: 09/24/2019 by Carol Wesley

I like that this device detects both CO and natural gas now that our home has changed from oil to gas heat. The back up battery is also a comfort.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/52-in-1 Gas Alarm

Reviewed: 08/23/2019 by Dave

- Very compact - Easy to order - Easy to install, just plug it in - Great price I have four units in my home and will return to Universal when I need replacements.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Quick and Easy

Reviewed: 05/02/2018 by Kristin Pardue

Quick and easy safety.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Plug-In 2-in-1

Reviewed: 02/14/2017 by Sam Stierman

Easy to install--pull the battery tab and plug it in.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/52 in 1 Alarm

Reviewed: 12/14/2016 by Robert Norwillo

A combination safety device which was a cinch to install and test. I simply trust that it does not alarm as it is designed to do. Thank you.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Excellent

Reviewed: 10/26/2016 by John  Lelli

Excellent

Write A Review For This Product Review
Q: WHAT LEVELS (PPM) OF CARBON MONOXIDE CAUSE AN ALARM?
A: Carbon monoxide alarms are designed to alarm before the average healthy adult feels symptoms. Since you cannot see or smell CO, never assume it's not present. Underwriters Laboratories Inc. Standard UL2034 requires residential CO alarms to sound when exposure times and exposure levels of CO in the chart below. CO alarm levels are measured in parts per million (ppm) of CO over time (in minutes). The UL2034 Required Alarm Points are:
  • If the Alarm is exposed to 400 ppm of CO, it must alarm between 4 and 15 minutes.
  • If the Alarm is exposed to 150 ppm of CO, it must alarm between 10 and 50 minutes.
  • If the Alarm is exposed to 70 ppm of CO, it must alarm between 60 and 240 minutes.

Q: IS CARBON MONOXIDE HEAVIER THAN AIR?
A: Carbon monoxide is not heavier than air. A carbon monoxide alarm should be installed in a location where the alarm will stay clean, and out of the way of children or pets. Refer to the user's manual for specific installation requirements.

Q: WHERE SHOULD I INSTALL MY CARBON MONOXIDE ALARMS?
A: It is very important to install a carbon monoxide alarm outside each separate sleeping area, and for maximum protection, install one in every bedroom. Many states now require installation of a carbon monoxide alarm inside each bedroom. For added protection, placement of an additional carbon monoxide alarm at least 15-20 feet away from the furnace or fuel burning heat sources is recommended. Install carbon monoxide alarms a minimum of 10 feet from sources of humidity like bathrooms and showers. In multiple-story dwellings, install one carbon monoxide alarm on every level. If you have a basement, install a carbon monoxide alarm at the top of the basement stairs, and in each separate sleeping area.

Q: WHAT AREAS SHOULD I AVOID INSTALLATION OF A CARBON MONOXIDE ALARM?
A: Do not install carbon monoxide alarms in garages, kitchens, furnace rooms, or in any extremely dusty, dirty, humid, or greasy areas. Do not install alarms in direct sunlight, or areas subjected to temperature extremes. These areas include unconditioned crawl spaces, unfinished attics, un-insulated or poorly insulated ceilings, and porches. Carbon monoxide alarms should not be installed in outlets covered by curtains, heavy furniture or other obstructions. Do not install in turbulent air-near ceiling fans, heat vents, air conditioners, fresh air returns, or open windows. Blowing air may prevent carbon monoxide from reaching the CO sensors.

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