Co2 Sensor(168)
Uses item details. Price when purchased online
SITERWELL Hardwired Interconnected Smoke and Carbon Monoxide Detector, 10 Year Product Life Alarm Smoke Carbon Monoxide Detector with 2 AA Batteries Back Up, Smoke and CO Detector Voice Alert,1 Pack From $54.90
Sponsored
From$5490
SITERWELL Hardwired Interconnected Smoke and Carbon Monoxide Detector, 10 Year Product Life Alarm Smoke Carbon Monoxide Detector with 2 AA Batteries Back Up, Smoke and CO Detector Voice Alert,1 Pack
224.2 out of 5 Stars. 22 reviews
Rollback SITERWELL Hardwired Smoke & Carbon Monoxide Detector Combo,10 Year Battery,UL217-9th,Interconnected,Bilingual Voice Alerts,6.1in*1.65in.3 pack From $116.79
Sponsored
From$11679
SITERWELL Hardwired Smoke & Carbon Monoxide Detector Combo,10 Year Battery,UL217-9th,Interconnected,Bilingual Voice Alerts,6.1in*1.65in.3 pack
45 out of 5 Stars. 4 reviews
3-in-1 Portable CO2 Detector with Carbon Monoxide Sensor, Rechargeable Handheld Indoor Air Quality Monitor with Temperature & Humidity for Home, Car and RV $22.99
Sponsored
$2299
current price $22.993-in-1 Portable CO2 Detector with Carbon Monoxide Sensor, Rechargeable Handheld Indoor Air Quality Monitor with Temperature & Humidity for Home, Car and RV
Siterwell AA Battery Operated Carbon Monoxide Detector Alarm, LCD Display,Portable for Travel Home,1-pack From $25.99
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From$2599
Siterwell AA Battery Operated Carbon Monoxide Detector Alarm, LCD Display,Portable for Travel Home,1-pack
1314.6 out of 5 Stars. 131 reviews
Kidde AA Battery Operated Basic Carbon Monoxide Alarm - 9CO5
3 options
Available in additional 3 optionsKidde AA Battery Operated Basic Carbon Monoxide Alarm - 9CO5
7334.7 out of 5 Stars. 733 reviews
100+ bought since yesterday Kidde AC Plug-In Carbon Monoxide Detector with Battery Backup, CO Alarm with LED Light Indicators From $27.47
3 options
Available in additional 3 optionsFrom$2747
Kidde AC Plug-In Carbon Monoxide Detector with Battery Backup, CO Alarm with LED Light Indicators
17754.7 out of 5 Stars. 1775 reviews
NFTIGB CO2 Sensor Module 0-10000ppm Carbon Dioxide Detection Sensor Board TTL Output for Testing Gas Sensor Module Carbon Dioxide Detection High Accuracy Monitoring Tool $36.38
$3638
current price $36.38NFTIGB CO2 Sensor Module 0-10000ppm Carbon Dioxide Detection Sensor Board TTL Output for Testing Gas Sensor Module Carbon Dioxide Detection High Accuracy Monitoring Tool
M Buder Portable Air Quality Detector CO2 TVOC HCHO Humidity Temperature 5 in 1 Multifunctional Indoor Air Quality Tester Meter, LCD Display, Carbon Dioxide Monitor for Home Office, Black From $17.08
From$1708
M Buder Portable Air Quality Detector CO2 TVOC HCHO Humidity Temperature 5 in 1 Multifunctional Indoor Air Quality Tester Meter, LCD Display, Carbon Dioxide Monitor for Home Office, Black
Vrorvz Portable Handheld CO2 Detector Accurate CO Sensor Monitors Indoor Air Quality Temperature Humidity for Home Tent Car RV Compact Lightweight，TYPE C Charging Was $19.98
Vrorvz Portable Handheld CO2 Detector Accurate CO Sensor Monitors Indoor Air Quality Temperature Humidity for Home Tent Car RV Compact Lightweight，TYPE C Charging
15 out of 5 Stars. 1 reviews
Air Quality Monitors, Detects PM2.5, CO2, PM10,PM 1.0, Formaldehyde,TVOC,Temperature and Humidity Air Quality
Air Quality Monitors, Detects PM2.5, CO2, PM10,PM 1.0, Formaldehyde,TVOC,Temperature and Humidity Air Quality
Universal Security Instruments, Sensing Plus, Hardwired, Combo Smoke, Fire & Carbon Monoxide Alarm, with 10-Year Battery Backup From $59.00
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From$5900
Universal Security Instruments, Sensing Plus, Hardwired, Combo Smoke, Fire & Carbon Monoxide Alarm, with 10-Year Battery Backup
894.3 out of 5 Stars. 89 reviews
Kidde Battery-Operated Combination Smoke & Carbon Monoxide Detector, Voice Alerts From $49.96
Sponsored
From$4996
Kidde Battery-Operated Combination Smoke & Carbon Monoxide Detector, Voice Alerts
3234.4 out of 5 Stars. 323 reviews
Siterwell AA Battery Operated Carbon Monoxide Detector Alarm, LCD Display,Portable for Travel Home,1-pack From $25.99
3 options
Available in additional 3 optionsFrom$2599
Siterwell AA Battery Operated Carbon Monoxide Detector Alarm, LCD Display,Portable for Travel Home,1-pack
1314.6 out of 5 Stars. 131 reviews
Yajisi CO2 Air Detector Carbon Dioxide Monitor Agricultural Greenhouse Monitor 140x125x42mm / 5.5x4.9x1.7 inches White
Yajisi CO2 Air Detector Carbon Dioxide Monitor Agricultural Greenhouse Monitor 140x125x42mm / 5.5x4.9x1.7 inches White
3-in-1 CO Detector, Handheld Carbon Monoxide Sensor with CO2 Concentration, Temperature & Humidity Monitor, Natural Gas & Smoke Alarm for Home Apartment Hotel Camping RV
3-in-1 CO Detector, Handheld Carbon Monoxide Sensor with CO2 Concentration, Temperature & Humidity Monitor, Natural Gas & Smoke Alarm for Home Apartment Hotel Camping RV
15 out of 5 Stars. 1 reviews
BIMZUC Carbon Dioxide Sensor Module CO2 Temperature Humidity Monitor Detection 50ppm Accuracy $37.83
$3783
current price $37.83BIMZUC Carbon Dioxide Sensor Module CO2 Temperature Humidity Monitor Detection 50ppm Accuracy
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
$4090
current price $40.90VEVOR Carbon Dioxide Monitor, CO2 Controller with Temperature and Humidity Display, NDIR Sensor, Carbon Dioxide Detector for Bedside, Home, Office, Car, Lightweight & Portable
11 out of 5 Stars. 1 reviews
GJX 2026 New Carbon Dioxide Detector for Air Quality,Temperature,And Humidity,Rapid Co2 Measurement for Home,Office,Classroom,Laboratory,Industrial Use White Gas Detector $14.92
$1492
current price $14.92GJX 2026 New Carbon Dioxide Detector for Air Quality,Temperature,And Humidity,Rapid Co2 Measurement for Home,Office,Classroom,Laboratory,Industrial Use White Gas Detector
Clearance Portable CO2 Detector 3-in-1 Carbon Monoxide Sensor | Handheld Indoor Air Quality Monitor | Measures CO2 Levels, Temperature, Humidity | Rechargeable | Compact | For Home, Car, RV | 85x51x17mm Was $20.61
Portable CO2 Detector 3-in-1 Carbon Monoxide Sensor | Handheld Indoor Air Quality Monitor | Measures CO2 Levels, Temperature, Humidity | Rechargeable | Compact | For Home, Car, RV | 85x51x17mm
24.5 out of 5 Stars. 2 reviews
Kidde Nighthawk Plug-In AC/DC Carbon Monoxide Alarm Detector with Digital Display KN-COPP-3 From $42.94
3 options
Available in additional 3 optionsFrom$4294
Kidde Nighthawk Plug-In AC/DC Carbon Monoxide Alarm Detector with Digital Display KN-COPP-3
2664.5 out of 5 Stars. 266 reviews
50+ bought since yesterday Kidde Battery-Operated 4-inch Smoke Detector & Carbon Monoxide Value Pack, Batteries Included From $38.97
Sponsored
From$3897
Kidde Battery-Operated 4-inch Smoke Detector & Carbon Monoxide Value Pack, Batteries Included
7414.5 out of 5 Stars. 741 reviews
Kidde 10-Year Sealed Lithium Battery-Operated Combination Smoke & Carbon Monoxide Detector From $60.00
Sponsored
From$6000
Kidde 10-Year Sealed Lithium Battery-Operated Combination Smoke & Carbon Monoxide Detector
4144.2 out of 5 Stars. 414 reviews
FHBVT 5 In 1 Indoor Air Quality Monitor HCHO TVOC CO2 Tester Temperature Humidity Sensor Rechargeable LED Display with Alarm Accurate Reading Air Detector for Home Office Bedroom Living Room
FHBVT 5 In 1 Indoor Air Quality Monitor HCHO TVOC CO2 Tester Temperature Humidity Sensor Rechargeable LED Display with Alarm Accurate Reading Air Detector for Home Office Bedroom Living Room
GJX 2026 New 9 in 1 Air Quality Tester Co2 Meter Carbon Dioxide Detector Time/Date Pm2.5 for Home,Office,Indoor Air Quality,Health Monitoring,Environmental Testing,Workplace Use $31.02
$3102
current price $31.02GJX 2026 New 9 in 1 Air Quality Tester Co2 Meter Carbon Dioxide Detector Time/Date Pm2.5 for Home,Office,Indoor Air Quality,Health Monitoring,Environmental Testing,Workplace Use
Portable Co2 DetectorforTravel, Co2, HumidityandTemperature Monitor, Formaldehyde Detector, Battery Carbon Monoxide Detector, 2.5X4.5 In, White, 1 Pc, Compact, Handheld,
Portable Co2 DetectorforTravel, Co2, HumidityandTemperature Monitor, Formaldehyde Detector, Battery Carbon Monoxide Detector, 2.5X4.5 In, White, 1 Pc, Compact, Handheld,
GJX Portable Handheld CO2 Detector Accurate CO Sensor Monitors Indoor Air Quality Temperature Humidity for Home Tent Car RV Compact Lightweight with Charging $21.73
$2173
current price $21.73GJX Portable Handheld CO2 Detector Accurate CO Sensor Monitors Indoor Air Quality Temperature Humidity for Home Tent Car RV Compact Lightweight with Charging
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, White Was $79.99
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, White
494.4 out of 5 Stars. 49 reviews
Wifi Multifunctional Air Quality Detector PM2.5 CO CO2 Temperature Humidity Air Quality Monitor
Wifi Multifunctional Air Quality Detector PM2.5 CO CO2 Temperature Humidity Air Quality Monitor
3-in-1 Portable CO2 Meter, Handheld Air Quality Detector with Carbon Monoxide Sensor and Temperature Humidity Monitor for Home Office Car and Travel, 3.35x2.01x0.67in Was $24.31
3-in-1 Portable CO2 Meter, Handheld Air Quality Detector with Carbon Monoxide Sensor and Temperature Humidity Monitor for Home Office Car and Travel, 3.35x2.01x0.67in
25 out of 5 Stars. 2 reviews
100+ bought since yesterday Kidde AA Battery Operated Basic Carbon Monoxide Alarm - 9CO5-LP3 $23.44
$2344
current price $23.44Kidde AA Battery Operated Basic Carbon Monoxide Alarm - 9CO5-LP3
5394.7 out of 5 Stars. 539 reviews
Kidde Battery-Operated Combination Smoke & Carbon Monoxide Detector, Batteries Included From $49.97
Sponsored
From$4997
Kidde Battery-Operated Combination Smoke & Carbon Monoxide Detector, Batteries Included
2114.6 out of 5 Stars. 211 reviews
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
Sponsored
$4090
current price $40.90VEVOR Carbon Dioxide Monitor, CO2 Controller with Temperature and Humidity Display, NDIR Sensor, Carbon Dioxide Detector for Bedside, Home, Office, Car, Lightweight & Portable
11 out of 5 Stars. 1 reviews
Nieyigj Infrared CO2 Carbon Dioxide Sensor S8-0053 400-2000PPM UART PWM Modbus Gas Monitor - 1.97 inches / 5.0 cm
Nieyigj Infrared CO2 Carbon Dioxide Sensor S8-0053 400-2000PPM UART PWM Modbus Gas Monitor - 1.97 inches / 5.0 cm
GJX Portable Co2 Detector for Travel,Co2,Humidity and Temperature Monitor,Formaldehyde Detector,Battery Carbon Monoxide Detector,2.5X4.5 In,White,1 Pc,Compact,Handheld $27.03
$2703
current price $27.03GJX Portable Co2 Detector for Travel,Co2,Humidity and Temperature Monitor,Formaldehyde Detector,Battery Carbon Monoxide Detector,2.5X4.5 In,White,1 Pc,Compact,Handheld
GJX 2026 New Portable 3-In-1 Co2 Meter Detector,High Precision Carbon Monoxide Sensor,Monitors Indoor Air Quality,Temperature,Humidity,Compact Handheld Device,Rechargeable,85X51X17Mm $21.33
$2133
current price $21.33GJX 2026 New Portable 3-In-1 Co2 Meter Detector,High Precision Carbon Monoxide Sensor,Monitors Indoor Air Quality,Temperature,Humidity,Compact Handheld Device,Rechargeable,85X51X17Mm
GJX 2026 New 6 in 1 Air Quality Monitor Carbon Dioxide Detector Hcho Tvoc Pm2.5/Pm10 Co Test for Home,Office,Classroom,Laboratory,Indoor $22.97
$2297
current price $22.97GJX 2026 New 6 in 1 Air Quality Monitor Carbon Dioxide Detector Hcho Tvoc Pm2.5/Pm10 Co Test for Home,Office,Classroom,Laboratory,Indoor
Fil-fresh 5 in 1 Air Quality Monitor Indoor with Real-Time Temp, Humidity & Clock Display Portable CO2 AQI Detector for Home, Office, Car $22.99
$2299
current price $22.99Fil-fresh 5 in 1 Air Quality Monitor Indoor with Real-Time Temp, Humidity & Clock Display Portable CO2 AQI Detector for Home, Office, Car
RRJ CO2 Detector, Portable Handheld Air Quality Monitor with Carbon Monoxide Sensor, Indoor Temperature Humidity Meter for Home Office Car RV Travel Safety $19.99 Was $23.99
Now$1999
current price Now $19.99, Was $23.99$23.99
RRJ CO2 Detector, Portable Handheld Air Quality Monitor with Carbon Monoxide Sensor, Indoor Temperature Humidity Meter for Home Office Car RV Travel Safety
Tester Multifunctional Air Quality Detector PM2.5 CO CO2 Temperature Humidity Air Quality Monitor From $28.37
From$2837
Tester Multifunctional Air Quality Detector PM2.5 CO CO2 Temperature Humidity Air Quality Monitor
4 in 1 Gas Detector,CO CO2 Temp Humidity Monitoring,Precision 1ppm,0-1000ppm Range,Built-in 2000mAh Battery,Magnetic Back Panel,Portable with Flashlight,Air Quality Safety Tool Was $22.91
4 in 1 Gas Detector,CO CO2 Temp Humidity Monitoring,Precision 1ppm,0-1000ppm Range,Built-in 2000mAh Battery,Magnetic Back Panel,Portable with Flashlight,Air Quality Safety Tool
6 In 1 CO2 Detector Formaldehyde Detector Tester Air Quality Monitor for TVOC
6 In 1 CO2 Detector Formaldehyde Detector Tester Air Quality Monitor for TVOC
GJX 3-in-1 CO Detector, Handheld Carbon Monoxide Sensor with CO2 Concentration, Temperature&Humidity Monitor, Natural Gas&Smoke Alarm for Home Apartment Hotel Camping RV $26.98
$2698
current price $26.98GJX 3-in-1 CO Detector, Handheld Carbon Monoxide Sensor with CO2 Concentration, Temperature&Humidity Monitor, Natural Gas&Smoke Alarm for Home Apartment Hotel Camping RV
Air Quality Monitors Indoor PPM2.5 PM10 CO2 TVOC HCHO Humidity & Temperature Detectors Large Display From $20.67
From$2067
Air Quality Monitors Indoor PPM2.5 PM10 CO2 TVOC HCHO Humidity & Temperature Detectors Large Display
Reduced price 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 $74.19 Was $105.99
Now$7419
current price Now $74.19, Was $105.99$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
15 out of 5 Stars. 1 reviews
GJX 2026 New Portable 3-In-1 Co2 Meter Detector,High Precision Carbon Monoxide Sensor,Monitors Indoor Air Quality,Temperature,Humidity,Compact Handheld Device,Type-C Rechargeable,85X51X17Mm $23.38
$2338
current price $23.38GJX 2026 New Portable 3-In-1 Co2 Meter Detector,High Precision Carbon Monoxide Sensor,Monitors Indoor Air Quality,Temperature,Humidity,Compact Handheld Device,Type-C Rechargeable,85X51X17Mm
UUHYTG Portable CO2 Detector Carbon Dioxide Monitor with Temperature and Humidity Sensor, Handheld Indoor Air Quality Tester for Home Office Classroom Car RV, Rechargeable Display Meter Was $28.92
UUHYTG Portable CO2 Detector Carbon Dioxide Monitor with Temperature and Humidity Sensor, Handheld Indoor Air Quality Tester for Home Office Classroom Car RV, Rechargeable Display Meter
Air Quality Monitors CO2 Meter Carbon Dioxide Detectors CO2 TVOC HCHO PM2.5 PM 1.0 PM10 Temperature Humidity
Air Quality Monitors CO2 Meter Carbon Dioxide Detectors CO2 TVOC HCHO PM2.5 PM 1.0 PM10 Temperature Humidity
Elowen Multifunctional Air Tester 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 $17.51
$1751
current price $17.51Elowen Multifunctional Air Tester 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
Air Quality Monitor CO2 HCHO TVOC Tester USB Rechargeable Room Temperature Humidity Meter Gas Analyzers $32.55
$3255
current price $32.55Air Quality Monitor CO2 HCHO TVOC Tester USB Rechargeable Room Temperature Humidity Meter Gas Analyzers
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