Co Meter(139)
Black Friday Deal, X-Sense Smoke and Carbon Monoxide Detector Combo, 10-Year Sensor with Digital Display, Standalone Alarm, Certified to Latest UL Standards, 4-PACK From $59.99

X-Sense Smoke and Carbon Monoxide Detector Combo, 10-Year Sensor with Digital Display, Standalone Alarm, Certified to Latest UL Standards, 4-PACK
4-in-1 Gas Detector, Portable Rechargeable Multi-Gas Monitor Meter Tester with LCD Display & Vibration Alarm for CO/O2/H2S/EX, IP65 Dust & Water Resistant $129.99

4-in-1 Gas Detector, Portable Rechargeable Multi-Gas Monitor Meter Tester with LCD Display & Vibration Alarm for CO/O2/H2S/EX, IP65 Dust & Water Resistant
Handheld Carbon Monoxide Meter CO Detector Portable CO Gas Leak Detector High Precision Carbon Monoxide Tester $39.99

Handheld Carbon Monoxide Meter CO Detector Portable CO Gas Leak Detector High Precision Carbon Monoxide Tester
Handheld Carbon Monoxide Meter CO Detector Portable CO Gas Leak Detector High Precision Carbon Monoxide Tester $40.99

Handheld Carbon Monoxide Meter CO Detector Portable CO Gas Leak Detector High Precision Carbon Monoxide Tester
Black Friday Deal, X-Sense Smoke and Carbon Monoxide Detector Combo, 10-Year Sensor with Digital Display, Standalone Alarm, Certified to Latest UL Standards, 2-PACK From $59.99

X-Sense Smoke and Carbon Monoxide Detector Combo, 10-Year Sensor with Digital Display, Standalone Alarm, Certified to Latest UL Standards, 2-PACK
Black Friday Deal, Portable Air Quality Monitor – CO Level, Temperature & Humidity Display, Rechargeable Device for Travel, Car & Indoor Use From $23.83
Portable Air Quality Monitor – CO Level, Temperature & Humidity Display, Rechargeable Device for Travel, Car & Indoor Use
Rely Portable Carbon Monoxide Detector for Travel, Digital LCD Display, AA Battery Operated From $26.37

Rely Portable Carbon Monoxide Detector for Travel, Digital LCD Display, AA Battery Operated
TOPTES Carbon Monoxide Detector with TFT Display CT-580, Rechargeable Handheld CO Inspection Device with Vibration, Visual and Audible Alarm, CO Detector for Home, Jobsite, Garage, and Travel $56.99 Was $69.99

TOPTES Carbon Monoxide Detector with TFT Display CT-580, Rechargeable Handheld CO Inspection Device with Vibration, Visual and Audible Alarm, CO Detector for Home, Jobsite, Garage, and Travel
Carbon Monoxide Meter CO Detector CO Gas Leak Detector Gas Analyzer Carbon Monoxide Detectors $26.99

Carbon Monoxide Meter CO Detector CO Gas Leak Detector Gas Analyzer Carbon Monoxide Detectors
LUXY SONIC 4-in-1 Combustible Gas & C O Detector with Temperature and Humidity Display, Plug-in Portable Gas Leak Alarm for Home, Apartment, Hotel, Camping, RV(1 Pack) From $35.97

LUXY SONIC 4-in-1 Combustible Gas & C O Detector with Temperature and Humidity Display, Plug-in Portable Gas Leak Alarm for Home, Apartment, Hotel, Camping, RV(1 Pack)
Carbon Monoxide Meter CO Detector CO Gas Leak Detector Gas Analyzer Carbon Monoxide Detectors $26.99

Carbon Monoxide Meter CO Detector CO Gas Leak Detector Gas Analyzer Carbon Monoxide Detectors
Fil-fresh 16 in 1 Air Quality Monitor Indoor 7" Display 9 AQI+7 AQI Alerts, CO2 Monitor Air Quality Tester for CO2, TVOC, HCHO, PM2.5, PM1.0, PM10, Time, Temperature, Humidity Meter $75.99 Was $105.99

Fil-fresh 16 in 1 Air Quality Monitor Indoor 7" Display 9 AQI+7 AQI Alerts, CO2 Monitor Air Quality Tester for CO2, TVOC, HCHO, PM2.5, PM1.0, PM10, Time, Temperature, Humidity Meter
Handheld Carbon Monoxide Meter CO Detector Portable CO Gas Leak Detector High Precision Carbon Monoxide Tester $39.99

Handheld Carbon Monoxide Meter CO Detector Portable CO Gas Leak Detector High Precision Carbon Monoxide Tester
In 100+ people's carts, LCD Display CO Carbon Monoxide Gas Detector Device Home Safety Alarm Detector From $13.99
LCD Display CO Carbon Monoxide Gas Detector Device Home Safety Alarm Detector
LUXY SONIC 4-in-1 Carbon-Monoxide(C O)Alarm, Combustible Gas & C O Detector with Temperature and Humidity Display, Plug-in Portable Gas Leak Alarm for Home, Apartment, Hotel, Camping, RV(1 pack) From $35.97

LUXY SONIC 4-in-1 Carbon-Monoxide(C O)Alarm, Combustible Gas & C O Detector with Temperature and Humidity Display, Plug-in Portable Gas Leak Alarm for Home, Apartment, Hotel, Camping, RV(1 pack)
Portable Carbon Monoxide Detector, 10-Day Standby, Rechargeable Mini CO Monitor for Travel & Camping, Handheld CO Meter with Audible & Visual Alerts $20.56

Portable Carbon Monoxide Detector, 10-Day Standby, Rechargeable Mini CO Monitor for Travel & Camping, Handheld CO Meter with Audible & Visual Alerts
Knox Safety Battery Operated Carbon Monoxide Detector, Voice Alert & Display, 10-Year Lithium Power From $41.97

Knox Safety Battery Operated Carbon Monoxide Detector, Voice Alert & Display, 10-Year Lithium Power
Thalyn Temperature Humidity Monitor Air Quality Monitor Indoor Outdoor Air Analyzer CO2 HCHO TVOC CO Detector with Noise Temperature Humidity Sensor LCD Color Screen for Home Office Car Classroom $17.18

Thalyn Temperature Humidity Monitor Air Quality Monitor Indoor Outdoor Air Analyzer CO2 HCHO TVOC CO Detector with Noise Temperature Humidity Sensor LCD Color Screen for Home Office Car Classroom
Nexvue 6 in 1 RV CO Detector, Plug-In Gas Monitoring with Battery Backup, LCD Display Real-Time Digital Display, for Home, Apartment, RV From $39.98
Nexvue 6 in 1 RV CO Detector, Plug-In Gas Monitoring with Battery Backup, LCD Display Real-Time Digital Display, for Home, Apartment, RV
Handheld Carbon Monoxide Meter CO Detector Portable CO Gas Leak Detector High Precision Carbon Monoxide Tester $40.99

Handheld Carbon Monoxide Meter CO Detector Portable CO Gas Leak Detector High Precision Carbon Monoxide Tester
VEVOR Carbon Dioxide Monitoring Controller, Dual Outlets Carbon Dioxide Controller, CO2 Meter Monitor Day and Night Detection Feature, NDIR CO2 Sensor for Green House, Laboratories, Classrooms, Home $92.90 Was $137.90

VEVOR Carbon Dioxide Monitoring Controller, Dual Outlets Carbon Dioxide Controller, CO2 Meter Monitor Day and Night Detection Feature, NDIR CO2 Sensor for Green House, Laboratories, Classrooms, Home
Clearance, Fixdono High Sensitivity Natural Gas Detector, Plug-in Gas Monitor for Home Safety $16.99 Was $29.99

Fixdono High Sensitivity Natural Gas Detector, Plug-in Gas Monitor for Home Safety
100+ bought since yesterday, Kidde Battery-Operated Combination Smoke & Carbon Monoxide Detector, Voice Alerts, Model 30CUDR-V From $49.96

Kidde Battery-Operated Combination Smoke & Carbon Monoxide Detector, Voice Alerts, Model 30CUDR-V
LCD Display CO Carbon Monoxide Detector, Portable Home Safety Gas Alarm Detector, CO Gas Monitor Alert Device for Indoor Household Office Safety Protection $14.89

LCD Display CO Carbon Monoxide Detector, Portable Home Safety Gas Alarm Detector, CO Gas Monitor Alert Device for Indoor Household Office Safety Protection
Clearance, Fixdono High Sensitivity Natural Gas Detector, Plug-in Gas Monitor for Home Safety $16.99 Was $29.99

Fixdono High Sensitivity Natural Gas Detector, Plug-in Gas Monitor for Home Safety
Portable Carbon Monoxide Detector, 4-in-1 CO CO2 Temperature Humidity Monitor with Flashlight & Magnetic Back, Rechargeable Gas Analyzer for Camping Home Car RV Travel From $21.29
Portable Carbon Monoxide Detector, 4-in-1 CO CO2 Temperature Humidity Monitor with Flashlight & Magnetic Back, Rechargeable Gas Analyzer for Camping Home Car RV Travel
In 100+ people's carts, Kidde Carbon Monoxide Detector, Plug-In with AA Battery Backup, Rotating Plug, 85 dB Alarm, COP From $34.97

Kidde Carbon Monoxide Detector, Plug-In with AA Battery Backup, Rotating Plug, 85 dB Alarm, COP
Sentivo CO Detector, 4-in-1 Gas Monitor with Digital Display, Audible Alert and Visual Status Indicator for Indoor Home Safety From $25.99
Sentivo CO Detector, 4-in-1 Gas Monitor with Digital Display, Audible Alert and Visual Status Indicator for Indoor Home Safety
Veevvio Handheld 3-in-1 Carbon Monoxide Detector, Temperature & Humidity Monitor Portable Electrochemical Sensor Alarm for Home, Travel, Car, Apartment Air Quality Tester $35.99

Veevvio Handheld 3-in-1 Carbon Monoxide Detector, Temperature & Humidity Monitor Portable Electrochemical Sensor Alarm for Home, Travel, Car, Apartment Air Quality Tester
Thalyn Temperature Humidity Monitor Air Quality Monitor Indoor Outdoor Air Analyzer CO2 HCHO TVOC CO Detector with Noise Temperature Humidity Sensor LCD Color Screen for Home Office Car Classroom $16.81

Thalyn Temperature Humidity Monitor Air Quality Monitor Indoor Outdoor Air Analyzer CO2 HCHO TVOC CO Detector with Noise Temperature Humidity Sensor LCD Color Screen for Home Office Car Classroom
VEVOR Carbon Dioxide Monitor, CO2 Controller with Temperature and Humidity Display, NDIR Sensor, Carbon Dioxide Detector for Bedside, Home, Office, Car, Lightweight & Portable $40.90

VEVOR Carbon Dioxide Monitor, CO2 Controller with Temperature and Humidity Display, NDIR Sensor, Carbon Dioxide Detector for Bedside, Home, Office, Car, Lightweight & Portable
Newentor CO2 Monitor, Indoor Air Quality Meters, Real-Time Temperature & Humidity Monitor, Carbon Dioxide Detector with Alerts, Alarm Clock, for Home, Office, and Greenhouse Use, Black From $48.99

Newentor CO2 Monitor, Indoor Air Quality Meters, Real-Time Temperature & Humidity Monitor, Carbon Dioxide Detector with Alerts, Alarm Clock, for Home, Office, and Greenhouse Use, Black
Multifunctional Air Quality Detector PM2.5 CO CO2 Temperature Humidity Air Quality Monitor From $27.25
Multifunctional Air Quality Detector PM2.5 CO CO2 Temperature Humidity Air Quality Monitor
2026 NEW Steadfast Haven CO Detector, 4-in-1 Indoor Status Display, HD Screen, Plug-In Environment Information Device for Home, RV and Hotel From $35.98
2026 NEW Steadfast Haven CO Detector, 4-in-1 Indoor Status Display, HD Screen, Plug-In Environment Information Device for Home, RV and Hotel
Merano 6-in-1 Smoke,Gas & CO Detector,Digital Indoor Climate Meter, Home Temperature and Humidity Reader with Easy-to-Read Screen, Compact Room Environment Monitoring for Living Rooms, Offices

Merano 6-in-1 Smoke,Gas & CO Detector,Digital Indoor Climate Meter, Home Temperature and Humidity Reader with Easy-to-Read Screen, Compact Room Environment Monitoring for Living Rooms, Offices
Ivory Home Sense CO Detector, 6-in-1 Portable Gas Monitor, Plug-in & Battery Powered, 2.8" Rotatable Full-Color Digital Display, Magnetic Base, for Home, RV, Camping & Car Travel From $39.98
Ivory Home Sense CO Detector, 6-in-1 Portable Gas Monitor, Plug-in & Battery Powered, 2.8" Rotatable Full-Color Digital Display, Magnetic Base, for Home, RV, Camping & Car Travel
Dewlora 4-in-1 Co Detector, Dewlora Co Detector, 3-in-1 Gas Monitoring with a Visual Status Display, Ergonomic Design with Built-In Physical Audio Alert Component, Suitable for Indoor Use From $17.56
Dewlora 4-in-1 Co Detector, Dewlora Co Detector, 3-in-1 Gas Monitoring with a Visual Status Display, Ergonomic Design with Built-In Physical Audio Alert Component, Suitable for Indoor Use
Nexvue 6-in-1 RV CO Detector, Multi-Metric Monitor with High-Contrast Display and 85 dB Sound & Visual Alerts, 8-Hour Backup, Plug-In or Magnetic Mount, One-Touch Test for RVs, Campers & Home From $40.96
Nexvue 6-in-1 RV CO Detector, Multi-Metric Monitor with High-Contrast Display and 85 dB Sound & Visual Alerts, 8-Hour Backup, Plug-In or Magnetic Mount, One-Touch Test for RVs, Campers & Home
6 in 1 Portable Air Quality Monitor with Large Screen Detects PM2.5 PM10 HCHO TVOC CO CO2 for Home Office Travel Was $19.10

6 in 1 Portable Air Quality Monitor with Large Screen Detects PM2.5 PM10 HCHO TVOC CO CO2 for Home Office Travel
Sentivo Co Detector, Plug-in Indoor Air Quality Detector with HD Display for Home Office School Garage From $48.90
Sentivo Co Detector, Plug-in Indoor Air Quality Detector with HD Display for Home Office School Garage
Merano 6-in-1 Smoke, Gas & CO Detector, Indoor Air Quality Monitor with Digital Display, Temperature & Humidity Readings for Home, Apartment & RV From $28.89
Merano 6-in-1 Smoke, Gas & CO Detector, Indoor Air Quality Monitor with Digital Display, Temperature & Humidity Readings for Home, Apartment & RV
6‑In‑1 Portable Gas Detector, Environmental Hazard Detector, High‑Sensitivity Sensors, Clear Real‑Time Data Readout, Great For Indoor Home And Mobile Vehicle Use

6‑In‑1 Portable Gas Detector, Environmental Hazard Detector, High‑Sensitivity Sensors, Clear Real‑Time Data Readout, Great For Indoor Home And Mobile Vehicle Use
Anxinwu Smoke Gas CO Detector Monitor - 5 in 1 Rechargeable Sensor with Temperature Humidity Display and Audible Alarm for Indoor Residential Safety $22.79 Was $26.99

Anxinwu Smoke Gas CO Detector Monitor - 5 in 1 Rechargeable Sensor with Temperature Humidity Display and Audible Alarm for Indoor Residential Safety
Air quality tester,Portable Carbon Air Quality Tester Display Co Test Meter Temperature And Meter Co Led Display Monoxide Tester Temperature Co Air Portablewifi Multicolor $39.71

Air quality tester,Portable Carbon Air Quality Tester Display Co Test Meter Temperature And Meter Co Led Display Monoxide Tester Temperature Co Air Portablewifi Multicolor
TOPTES Carbon Monoxide Detector CT-300, Handheld CO Alarm with Backlit LCD Display and Audible Visual Alerts, for Home, Car, Camping and Travel $41.39 Was $59.99

TOPTES Carbon Monoxide Detector CT-300, Handheld CO Alarm with Backlit LCD Display and Audible Visual Alerts, for Home, Car, Camping and Travel
Carbon One Safe 4 in 1 Detector, Multi-metric Indoor Monitor with High-Contrast Display, 85 Db Sound & Visual Alerts, Up to 8-Hour Backup, Plug-In or Magnetic Mount, One-Touch Test for Rvs & Home From $36.87
Carbon One Safe 4 in 1 Detector, Multi-metric Indoor Monitor with High-Contrast Display, 85 Db Sound & Visual Alerts, Up to 8-Hour Backup, Plug-In or Magnetic Mount, One-Touch Test for Rvs & Home
First Alert GCO1CN Combination Gas and Carbon Monoxide Alarm with Digital Display $50.45 $59.35/ea

First Alert GCO1CN Combination Gas and Carbon Monoxide Alarm with Digital Display
4-in-1 Gas Detector, Portable Rechargeable Multi-Gas Monitor Meter Tester with LCD Display & Vibration Alarm for CO/O2/H2S/EX, IP65 Dust & Water Resistant $129.99

4-in-1 Gas Detector, Portable Rechargeable Multi-Gas Monitor Meter Tester with LCD Display & Vibration Alarm for CO/O2/H2S/EX, IP65 Dust & Water Resistant
BPPEG Handheld Carbon Monoxide Meter CO Detector Portable CO Gas Leak Detector High Carbon Monoxide Tester portable carbon monoxide detector $39.94

BPPEG Handheld Carbon Monoxide Meter CO Detector Portable CO Gas Leak Detector High Carbon Monoxide Tester portable carbon monoxide detector
4-in-1 Gas Detector, Portable Multi Gas Monitor for O2 CO H2S and Combustible Gas LEL with Sound Light Vibration Alarm and LCD Backlight for and Industrial Use, Black
4-in-1 Gas Detector, Portable Multi Gas Monitor for O2 CO H2S and Combustible Gas LEL with Sound Light Vibration Alarm and LCD Backlight for and Industrial Use, Black
Other options to consider(27)
FAQ
How do I know if I need a CO meter at home?
Having a carbon monoxide (CO) meter is a smart choice for most homes, especially if you use gas appliances, fireplaces, or have an attached garage. CO is a colorless, odorless gas that can build up indoors without warning. Consider a CO meter if:
- You use gas stoves, heaters, or water heaters.
- Your home has a fireplace or wood-burning stove.
- There's an attached garage where cars are parked.
Even if you don't have these, a CO meter adds an extra layer of safety and peace of mind for your household.
Where should I place my carbon monoxide detector?
Proper placement helps your carbon monoxide detector work effectively. Here are some tips:
- Install detectors on every level of your home, especially near sleeping areas.
- Place them at least 5 feet above the floor, since CO is slightly lighter than air.
- Avoid putting detectors right next to fuel-burning appliances or in bathrooms, as steam and fumes can cause false alarms.
- If you have an attached garage, place a detector nearby to catch any CO that might enter your home.
Always follow the manufacturer's instructions for best results.
How do I test if my CO meter is working?
Testing your CO meter regularly helps ensure it's ready when you need it. To test:
- Press the "test" button on the device. You should hear a loud alarm if it's working.
- Check the display (if available) for any error messages or low battery warnings.
- Replace batteries as recommended, or check the power source for plug-in models.
It's a good idea to test your detector once a month. If the alarm doesn't sound or you notice any issues, consult the user manual or consider replacing the unit.
Can I use a CO meter while traveling or camping?
Yes, portable carbon monoxide meters are designed for travel and camping. They can help detect CO in:
- RVs and campers
- Tents with heaters
- Hotel rooms with gas appliances
Look for compact, battery-powered models that are easy to pack. Always follow the manufacturer's safety guidelines, and remember that a CO meter adds an extra layer of protection when you're away from home.
What maintenance does a carbon monoxide detector need?
Regular maintenance keeps your carbon monoxide detector reliable. Here’s what you can do:
- Test the alarm monthly using the test button.
- Replace batteries as recommended, or check the power source for sealed or plug-in models.
- Gently clean the unit with a dry cloth to remove dust.
- Check the expiration date—most detectors need replacing every 5 to 10 years.
Following these steps can help your detector stay in good working order and provide ongoing peace of mind.
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