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Carbon Monoxide Alarm

Often referred to as the 'silent killer', Carbon Monoxide (CO) is the leading cause of deaths attributed to poison in the United States. It is odorless, invisible and an extremely dangerous gas that can be emitted from everyday appliances to the car parked in your garage. Universal Security Instruments has recognized the lethality of CO and has outfitted its online store with all of the necessary equipment needed to eliminate any sort of lingering doubts and assure you the ultimate in peace of mind. The Hardwired Universal Smoke Sensing Smart Alarm with Smoke, Fire, Carbon Monoxide and Natural Gas Detection is the ideal choice for those looking for maximum protection. This 4-in-1 Alarm is able to quickly register and respond to the threat of fast-flaming fires, smoldering smoke, carbon monoxide and natural gas. This can be absolutely vital in giving you and your family an optimal amount of time to escape your home in the event of a fire or CO leak.

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USI Electric Hardwired 3-in-1 Smoke, Carbon Monoxide and Natural Gas Alarm (MICN109)
3-in-1 | Battery Drawer | Silence
Your Price: $44.95     Save: $15.00
Availability: In Stock

USI 3-in-1 Hardwired Smoke, Fire & Carbon Monoxide Smart Alarm with 10 Year Tamper-Proof Sealed Battery (MIC1509S)
Hardwired with 10 Year Sealed Battery Backup | USST Smart Alarm
Your Price: $47.95     Save: $12.00
Availability: In Stock

USI Electric Hardwired 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup (MCN108)
2-in-1 CO + Natural Gas | Smart Alarm
Your Price: $34.95     Save: $10.00
Availability: In Stock

Universal Security Instruments Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup (MCND401B)
Plug-In Alarm | Display Screen
Your Price: $39.95     Save: $10.00
Availability: On Order

USI Hallway 3-in-1 Smoke, Fire and Carbon Monoxide Smart Alarm with 10 Year Tamper-Proof Sealed Battery (MIC3510SB)
10 Year Sealed Tamper-Proof Battery | USST Smart Alarm
Your Price: $42.95     Save: $17.00
Availability: In Stock

Universal Security Instruments Every Room Carbon Monoxide Smart Alarm with 10 Year Sealed Battery (MC304SB)
10 Year Sealed Battery | Smart Alarm
Your Price: $24.95     Save: $10.00
Availability: In Stock

USI 4-in-1 Hardwired Universal Smoke Sensing Smart Alarm Smoke, Fire, CO and Natural Gas Detection (MDSCN111)
4-in-1 Alarm | Battery Drawer | Silence
Your Price: $59.95     Save: $20.00
Availability: In Stock

USI Hallway 3-in-1 Smoke, Fire and Carbon Monoxide Smart Alarm with 10 Year Tamper-Proof Sealed Battery (MICH3510S)
10 Year Sealed Tamper-Proof Battery | USST Smart Alarm
Your Price: $42.95     Save: $17.00
Availability: In Stock

Universal Security Instruments Every Room Digital Carbon Monoxide Smart Alarm with 10 Year Sealed Battery (MCD305SB)
10 Year Sealed Battery | CO Smart Alarm
Your Price: $34.99     Save: $4.96
Availability: In Stock

Universal Security Instruments Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup (MCN400B)
2-in-1 Plug-In | Smarrt Alarm
Your Price: $32.95     Save: $17.00
Availability: In Stock

USI 10 Year Alarm Starter Kit, Smoke, Fire & Carbon Monoxide Bundle, Includes 2 Alarms
Bundle and Save - 3 Threat Protection
Your Price: $39.87     Save: $25.03
Availability: In Stock

USI Apartment/Condo Smoke, Fire & Carbon Monoxide Bundle, 6 Alarms for Full Room Coverage
Bundle and Save - Perfect for Apartment or Condo Owners
Your Price: $133.20     Save: $86.50
Availability: In Stock

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USI's Carbon Monoxide Alarms come in a variety of models and employ various technologies to better recognize potential threats looming within your home or place of business. Due to their innate versatility, the following list has been composed to best represent each alarm's capabilities.


2-in-1 Carbon Monoxide and Natural Gas Smart Alarm:

  • Digital Display Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup
  • Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup
  • Hardwired 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery Backup


  • 3-in-1 Smoke, Carbon Monoxide and Natural Gas Smart Alarm:

  • Hardwired 3-in-1 Smoke, Carbon Monoxide and Natural Gas Alarm


  • 4-in-1 Smoke, Fire, Carbon Monoxide and Natural Gas Smart Alarm:

  • Hardwired Universal Smoke Sensing Smart Alarm with Smoke, Fire, Carbon Monoxide and Natural Gas Detection

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