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  • 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
  • Digital Display Screen with Three LED Colors Indicating Power, CO and Natural Gas
  • Quick Activation Pull Tab
  • Microprocessor Software Virtually Eliminates Nuisance Alarms
  • Compact Plug-in Design
  • No Additional Mounting Required
  • Swift Installation Process
  • 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.
Manuals

The Universal Security Instruments Electric MCND401 Plug-In Carbon Monoxide and Natural Gas Smart Alarm provides dual protection against two deadly threats: carbon monoxide and natural gas. This innovative 2-in-1 device simplifies installation while safeguarding your home and family. The compact plug-in design conveniently fits into any standard outlet, requiring no professional installation. This makes the alarm ideal for homes, apartments, or mobile homes.

  • Digital Display: This alarm features a digital display that shows real-time carbon monoxide (CO) levels in parts per million (PPM). This allows you to monitor CO concentration and take immediate action if levels exceed safety thresholds.
  • Microprocessor Intelligence: The 2-in-1 alarm utilizes microprocessor software to analyze readings and minimize false alarms. This ensures reliable detection while reducing unnecessary disruptions.
  • Peak CO Level Memory: This detector can record peak CO levels, aiding in identifying potential CO sources or trends.
  • Natural Gas Detection: The unit can detect the presence of natural gas, providing early warning of potential hazards.
  • Visual Gas Indicator: The alarm's display will indicate "GAS" when a natural gas leak is detected.
  • End-of-Service Life Warning: This 2-in-1 carbon monoxide and natural gas detector provides an alert when it reaches the end of its lifespan (approximately 7 years from activation). A 9-volt alkaline battery (included) continues protection in the event of a power outage.

This USI Carbon Monoxide and Natural Gas Detector 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 Universal Security Instruments Electric MCND401 Plug-In Carbon Monoxide and Natural Gas Smart Alarm comes with a 5 year limited warranty.

Recommended replacement for the following obsolete models:
- CD-9690

WHAT LEVELS (PPM) OF CARBON MONOXIDE CAUSE AN ALARM?
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.
WHERE DO NATURAL GAS LEAKS HAPPEN?
Having a home natural gas detector or alarm is crucial to ensure your safety, as leaks can originate from various parts of your plumbing. Interior gas lines, which transport gas throughout your house to appliances, can develop leaks due to corrosion, improper installation, or wear and tear. The appliances themselves, like furnaces, water heaters, and ovens, can also be culprits, leaking from faulty valves, hoses, or connections, especially if not maintained properly or if the appliances are old. Even underground pipes bringing gas to your house from the main line can leak due to accidental digging or events like earthquakes.
HOW OFTEN SHOULD I REPLACE MY HOME NATURAL GAS DETECTOR?
To ensure your home natural gas detector keeps you safe, replace it every seven years, even if there are no warning signs. Check the expiration date on the detector itself, but plan for replacement every seven years regardless. A natural gas detector will beep frequently (every 30 seconds to a minute) or display an "EOL" (End-of-Life) alert when nearing the end of its lifespan, but don't wait for these warnings before replacing.
WHY ARE MY NATURAL GAS DETECTORS BEEPING?
A beeping natural gas alarm can indicate either a dangerous gas leak or a less serious issue. Evacuate your home immediately and call 911 from outside if the beeping is continuous, as this signifies a potential leak. However, a natural gas leak detector alarm may use short, regular beeps (every minute or so) to signal low battery or the end of the detector's life.
IS CARBON MONOXIDE HEAVIER THAN AIR?
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.
WHERE SHOULD I INSTALL MY CARBON MONOXIDE ALARMS?
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.
WHAT AREAS SHOULD I AVOID INSTALLATION OF A CARBON MONOXIDE ALARM?
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.
WHY DO I NEED A NATURAL GAS DETECTOR?
When natural gas leaks into a confined space, it can build up to an explosive concentration. If there's an ignition source like a spark from an appliance or a lit cigarette, an explosion can occur.
Product Details
Product Specs
UPC:
042741204019
MPN:
MCND401B
Category:
Carbon Monoxide & Gas Alarms
Product Manuals
USI Digital Display Plug-In 2-in-1 CO and Natural Gas Smart Alarm Video

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MCND401B customer reviews

Overall Rating

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28 Reviews
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28 customers recommend this product
USI Digital Display Plug-In 2-in-1 CO and Natural Gas Smart Alarm Reviews
Timothy U
March 10, 2023
Verified Purchase
Dual gas alarm

As advertised. Arrived quickly. Hopefully it works if there is ever co2 or natural gas in house

Kathy S
October 24, 2022
Verified Purchase

So far it works well!! No problems at all!!

Barry S
July 16, 2022
Verified Purchase
CO and Natural Gas Detector

Items performed as advertised

Derek N
February 14, 2022
Verified Purchase
Great peace of mind

Installed near our living room where the gas fireplace is. You just never know when things could happen, it's good to know that this unit is there to alert us.

Elizabeth B
December 29, 2021
Verified Purchase
Simplicity is the word!

It couldn't be easier to be protected from the deadly airborne killers, carbon monoxide and natural gas. Simply plug it into a wall socket, set an expiration date on your iPhone and your good to go. Just forget about it!

Ronald G
November 21, 2021
Verified Purchase
Great Product

I find the product to be exactly what i needed in the house. I have a generator & this product fits perfectly. Fast delivery & easy to install. Certainly creates peace of mind in the entire house, knowing it is working to keep the family saye. Thank You.

William B
November 19, 2021
Verified Purchase
Universal Security Instruments Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm

It is hard to test a Carbon Monoxide and Natural Gas monitor, but the Unit quality appears to be high and the packaging was very minimal.

Ronald G
November 4, 2021
Verified Purchase
Great Product

Received the product quickly. Very easy to install & provides the security I need within the house. Really like the 2 in 1 feature with the battery backup, adds the safety & peace of mind for the family. Thanks.

Jennifer W
October 18, 2021
Verified Purchase
CO and CH4

Hasn't been needed yet but install went well.

Raghava C
October 11, 2021
Verified Purchase
Nice product

It was easy to set up and it is working fine.

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