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Safety Equipment and GearAir QualityAir ToolsAlarm SystemsAll Home SecurityAll Renewable EnergyBathroom Cabinets & FixturesBathroom PlumbingBrackets and Angle IronsBreakers, Distributors, and Load CentersCable ManagementCarbon Monoxide AlarmsChains, Ropes and TiedownsDimmers, Switches, and Wall PlatesDoor HardwareDoor Security HardwareElectric MotorsElectrical ToolsElectronic Communication ComponentsEmergency SuppliesEvaporative Coolers and PartsExtension Cord ReelsFastenersFire SafetyFurniture HardwareGarage Door Openers and HardwareGate HardwareGatesGuttering & DrainageHand ToolsHardware KnobsHingesHome SafetyHVAC Ducting and VentilationKeysKitchen HardwareLight BulbsPaint Supplies & ToolsPersonal PreparednessPersonal Protective EquipmentPipes, Fittings & AccessoriesPlumbing Tools & AccessoriesPower Tool AccessoriesPower ToolsPressure WashersProjectsRegisters and GrillsSafety DetectorsSolar AccessoriesSolar Charge ControllerSolar PanelsSolderingStorm & Flood PrepSurveillanceTestersThermostatsTool Equipment & StorageValves & Valve RepairWater Heaters, Pumps & TanksWelding & Cutting AccessoriesWelding ConsumablesWildfire PrepWindow Screens and FilmsWindow WeatherproofingWinter Prep
Ventilation Meter(10)
Uses item details. Price when purchased online
X-Sense Radon Detector with Audible Alerts, Long-Term Radon Monitor with Visual Display, Temperature & Humidity Tracking From $53.99
Sponsored
From$5399
X-Sense Radon Detector with Audible Alerts, Long-Term Radon Monitor with Visual Display, Temperature & Humidity Tracking
4.6 out of 5 stars
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

Sponsored
From$3597
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)
4.5 out of 5 stars
Flash Deal, 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 $47.99
Flash Deal

Sponsored
From$4799
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
4.5 out of 5 stars
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

Sponsored
Now$7599
current price Now $75.99, 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
4.3 out of 5 stars
Professional Digital Carbon Dioxide CO2 Detector and Smart Air Quality Monitor for Indoor Pollution Ventilation Meter with Temperature Humidity Sensor (4.72 x 4.72 x 1.57 inches / 12 x 12 x 4 cm) From $17.68
From$1768
Professional Digital Carbon Dioxide CO2 Detector and Smart Air Quality Monitor for Indoor Pollution Ventilation Meter with Temperature Humidity Sensor (4.72 x 4.72 x 1.57 inches / 12 x 12 x 4 cm)
PatungKu Multifunctional 50A 200A Current Power Inspector Meter For Solar Ventilation Battery Arrangements

PatungKu Multifunctional 50A 200A Current Power Inspector Meter For Solar Ventilation Battery Arrangements
5 out of 5 stars
Flash Deal, DQQKMM 10-in-1 Air Quality Monitor with Beep Alarms, Portable Real-Time Indoor Tester for Home, Office, Car & Pet Areas $21.59 Was $49.99
Flash Deal

Sponsored
Now$2159
current price Now $21.59, Was $49.99$49.99
DQQKMM 10-in-1 Air Quality Monitor with Beep Alarms, Portable Real-Time Indoor Tester for Home, Office, Car & Pet Areas
3.6 out of 5 stars
Joyloo 6 in 1 Air Quality Monitor, Joyeloo 6-in-1 Detector, 6-in-1 Detection with a Color Display, Sound Notification, Temperature & Humidity Tracking, Ideal for Use in Vehicles and Indoors From $39.98
Sponsored
From$3998
Joyloo 6 in 1 Air Quality Monitor, Joyeloo 6-in-1 Detector, 6-in-1 Detection with a Color Display, Sound Notification, Temperature & Humidity Tracking, Ideal for Use in Vehicles and Indoors
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 $40.96

Sponsored
From$4096
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
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

Sponsored
From$1756
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
5 out of 5 stars
Other options to consider(475)
Flash Deal, DQQKMM 10-in-1 Air Quality Monitor with Beep Alarms, Portable Real-Time Indoor Tester for Home, Office, Car & Pet Areas $21.59 Was $49.99
Flash Deal

Now$2159
current price Now $21.59, Was $49.99$49.99
DQQKMM 10-in-1 Air Quality Monitor with Beep Alarms, Portable Real-Time Indoor Tester for Home, Office, Car & Pet Areas
3.6 out of 5 stars
Flash Deal, 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
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
4.5 out of 5 stars
Black Friday Deal, Portable Air Quality Monitor – CO Level, Temperature & Humidity Display, Rechargeable Device for Travel, Car & Indoor Use From $23.83
From$2383
Portable Air Quality Monitor – CO Level, Temperature & Humidity Display, Rechargeable Device for Travel, Car & Indoor Use
4.8 out of 5 stars
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
Joyloo 6 in 1 Air Quality Monitor, Joyeloo 6-in-1 Detector, 6-in-1 Detection with a Color Display, Sound Notification, Temperature & Humidity Tracking, Ideal for Use in Vehicles and Indoors From $39.98
From$3998
Joyloo 6 in 1 Air Quality Monitor, Joyeloo 6-in-1 Detector, 6-in-1 Detection with a Color Display, Sound Notification, Temperature & Humidity Tracking, Ideal for Use in Vehicles and Indoors
Air Flow Detection System. Viewable"smoke" for testing air currents and movement. $52.95

$5295
current price $52.95Air Flow Detection System. Viewable"smoke" for testing air currents and movement.
QP Lite Air Quality Monitor $95.99

$9599
current price $95.99QP Lite Air Quality Monitor
Clearance, 4-in-1 Indoor Air Quality Monitor – Plug-in CO & Gas Detector with HD Digital Display, Ideal for Home Kitchens, Hotel Rooms, RV Camping & Commercial Spaces From $10.99
From$1099
4-in-1 Indoor Air Quality Monitor – Plug-in CO & Gas Detector with HD Digital Display, Ideal for Home Kitchens, Hotel Rooms, RV Camping & Commercial Spaces
4 out of 5 stars
Black Friday Deal, Povlen 3 in 1 Plug-in Indoor Air Quality Monitor with C O Level Display, Temperature & Humidity Reading, Digital C O Monitor for Home & Office $23.83 Was $32.99
Black Friday Deal

Now$2383
current price Now $23.83, Was $32.99$32.99
Povlen 3 in 1 Plug-in Indoor Air Quality Monitor with C O Level Display, Temperature & Humidity Reading, Digital C O Monitor for Home & Office
3.3 out of 5 stars
XUBIYM Air Quality Monitor Indoor,10In 1 Portable Smart Air Quality Tester for Co2 Tvoc Hcho Temp Aqi Pm0.3-1 Detection Suitable for Home,Cars,Plants,Pets and Hotels -Black $29.62

$2962
current price $29.62XUBIYM Air Quality Monitor Indoor,10In 1 Portable Smart Air Quality Tester for Co2 Tvoc Hcho Temp Aqi Pm0.3-1 Detection Suitable for Home,Cars,Plants,Pets and Hotels -Black
Air quality tester,Quality Meters Office Air Quality Indoor Indoor Tester Wifi 11-in-1 Air Restaurant Black $94.48

$9448
current price $94.48Air quality tester,Quality Meters Office Air Quality Indoor Indoor Tester Wifi 11-in-1 Air Restaurant Black
Clearance, Fixdono High Sensitivity Natural Gas Detector, Plug-in Gas Monitor for Home Safety $16.99 Was $29.99
Clearance

Now$1699
current price Now $16.99, Was $29.99$29.99
Fixdono High Sensitivity Natural Gas Detector, Plug-in Gas Monitor for Home Safety
4.3 out of 5 stars
IQAir Air Quality Monitor Indoor, White, Swiss Design, Professional Grade,1 Count per Pack, Assembled Product Height 3.5 in

2 options
Available in additional 2 optionsIQAir Air Quality Monitor Indoor, White, Swiss Design, Professional Grade,1 Count per Pack, Assembled Product Height 3.5 in
4.8 out of 5 stars
Best seller, Nurforta Mold Test Kit for Home Detection: 4 Simple DIY Science Kits for Fastly Testing Home Surfaces & Air Quality Detector & HVAC Monitor Includes Detailed Identification Guide Was $12.99
Nurforta Mold Test Kit for Home Detection: 4 Simple DIY Science Kits for Fastly Testing Home Surfaces & Air Quality Detector & HVAC Monitor Includes Detailed Identification Guide
4.4 out of 5 stars
BSIDE Handheld Air Quality Detector Meter Monitor Portable Rechargeable TVOC HCHO Tester (5.9 inches / 15 cm) $23.97

$2397
current price $23.97BSIDE Handheld Air Quality Detector Meter Monitor Portable Rechargeable TVOC HCHO Tester (5.9 inches / 15 cm)
4 out of 5 stars
Air Quality Monitor $129.00

$12900
current price $129.00Air Quality Monitor
3.7 out of 5 stars
Best seller, Hyper Tough 2-inch Brass & Steel Back-Mount Pressure Gauge, Manufacturer Part Number: 24-803HT From $7.64
Best seller

2 options
Available in additional 2 optionsFrom$764
Hyper Tough 2-inch Brass & Steel Back-Mount Pressure Gauge, Manufacturer Part Number: 24-803HT
4.4 out of 5 stars
Ywmsfl WIFI Home Smog Meter PM2.5 CO2 Air Quality Analysis Tester Gas Detector Analyze $33.13

$3313
current price $33.13Ywmsfl WIFI Home Smog Meter PM2.5 CO2 Air Quality Analysis Tester Gas Detector Analyze
6-in-1 Professional Indoor Air Quality Detector & Gas Monitor with LCD Color Screen | Precise Real-Time Tester for CO, CO2, TVOC, HCHO, PM2.5, PM10 (White, 3.5 x 2.8 in / 9.0 x 7.0 cm) $20.43

$2043
current price $20.436-in-1 Professional Indoor Air Quality Detector & Gas Monitor with LCD Color Screen | Precise Real-Time Tester for CO, CO2, TVOC, HCHO, PM2.5, PM10 (White, 3.5 x 2.8 in / 9.0 x 7.0 cm)
Temtop P600 PM2.5 PM10 Air Quality Monitor Rechargeable $69.99

$6999
current price $69.99Temtop P600 PM2.5 PM10 Air Quality Monitor Rechargeable
1 out of 5 stars
Natures Pinnacle 6-in-1 Digital Airquality Detector, Color Display Monitor. Temperature & Humidity Readings, Sound & Visual Alerts, Up to 8h Backup, Plug-In or Magnetic Mount, Self-Check for Home & R From $40.96
From$4096
Natures Pinnacle 6-in-1 Digital Airquality Detector, Color Display Monitor. Temperature & Humidity Readings, Sound & Visual Alerts, Up to 8h Backup, Plug-In or Magnetic Mount, Self-Check for Home & R
PM2.5 Air Quality Meter Particle Counter ,Gas Leak Test $249.02

$24902
current price $249.02PM2.5 Air Quality Meter Particle Counter ,Gas Leak Test
5-in-1 Gas Detector, Rechargeable Air Quality Tester with LCD Display, Audible & Visual Alert for CO2/HCHO/TVOC//Humidity Meter, Suitable for Home, Office, Greenhouse $24.99

$2499
current price $24.995-in-1 Gas Detector, Rechargeable Air Quality Tester with LCD Display, Audible & Visual Alert for CO2/HCHO/TVOC//Humidity Meter, Suitable for Home, Office, Greenhouse
X-Sense Radon Gas Detector Monitor for Home, Continuous & Real-Time Testing with Easy-to-Read LCD Display, No Installation or Lab Fees, XR0A-SR From $53.99
From$5399
X-Sense Radon Gas Detector Monitor for Home, Continuous & Real-Time Testing with Easy-to-Read LCD Display, No Installation or Lab Fees, XR0A-SR
4.6 out of 5 stars
Carbon Multifunctional Air Quality Detector PM2.5 CO CO2 Temperature Humidity Air Quality Monitor

Carbon Multifunctional Air Quality Detector PM2.5 CO CO2 Temperature Humidity Air Quality Monitor
10 in 1 Air Quality Monitor Indoor Portable Smart Tester for CO2 TVOC PM2.5 PM1.0 PM10 HCHO Detection Humidity for Home Cars Plants Pets $35.99

$3599
current price $35.9910 in 1 Air Quality Monitor Indoor Portable Smart Tester for CO2 TVOC PM2.5 PM1.0 PM10 HCHO Detection Humidity for Home Cars Plants Pets
1 out of 5 stars
8-in-1 Professional Indoor Air Quality Monitor Indoor Portable PM2.5/PM1/PM10 Monitor | Temperature | Formaldehyde Detector AQI+Humidity TVOC | Air Quality Tester - Confined Space Clean Air Monitor $23.80

$2380
current price $23.808-in-1 Professional Indoor Air Quality Monitor Indoor Portable PM2.5/PM1/PM10 Monitor | Temperature | Formaldehyde Detector AQI+Humidity TVOC | Air Quality Tester - Confined Space Clean Air Monitor
Black Friday Deal, VETOUCH Plug-in 3-in-1 CO2 Detector, Indoor Air Quality Monitor with Temp & Humidity, 85dB Alarm, LCD Display, ABS Plastic, Manual Calibration, 1-Pack From $35.99
Black Friday Deal

3 options
Available in additional 3 optionsFrom$3599
VETOUCH Plug-in 3-in-1 CO2 Detector, Indoor Air Quality Monitor with Temp & Humidity, 85dB Alarm, LCD Display, ABS Plastic, Manual Calibration, 1-Pack
4.2 out of 5 stars
Joyloo 6 in 1 Air Quality Monitor, Digital Gas Readings, Temperature and Humidity Display, Recharge Battery, Audible Alerts for Home, Apartment, RV From $39.98
From$3998
Joyloo 6 in 1 Air Quality Monitor, Digital Gas Readings, Temperature and Humidity Display, Recharge Battery, Audible Alerts for Home, Apartment, RV
Airthings Wave Mini - Indoor Air Quality Monitor with Mold-Risk Indication $81.00

$8100
current price $81.00Airthings Wave Mini - Indoor Air Quality Monitor with Mold-Risk Indication
4.1 out of 5 stars
kovex co detector,6-in-1 Home Air Quality Monitor with Gas Readings, Temperature & Humidity Display, Digital Indoor Monitoring Device for Apartment, RV & Daily Use From $39.96
From$3996
kovex co detector,6-in-1 Home Air Quality Monitor with Gas Readings, Temperature & Humidity Display, Digital Indoor Monitoring Device for Apartment, RV & Daily Use
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

3 options
Available in additional 3 optionsFrom$3597
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)
4.5 out of 5 stars
Airguard 4-in-1 Indoor Environment Monitor with Temperature & Humidity Display, LCD Screen, Plug-In Design for Home, Hotel & RV From $35.98

2 options
Available in additional 2 optionsFrom$3598
Airguard 4-in-1 Indoor Environment Monitor with Temperature & Humidity Display, LCD Screen, Plug-In Design for Home, Hotel & RV
Professional 5-in-1 Air Quality Monitor Portable CO2 TVOC HCHO PM2.5 PM10 Detector with Backlit LCD Screen & Warning Alarm for Indoor Home Office (Black, 5.5 x 3.9 inches / 14 x 10 cm) From $20.93
From$2093
Professional 5-in-1 Air Quality Monitor Portable CO2 TVOC HCHO PM2.5 PM10 Detector with Backlit LCD Screen & Warning Alarm for Indoor Home Office (Black, 5.5 x 3.9 inches / 14 x 10 cm)
4-in-1 Indoor Air Quality Monitor – Plug-in CO & Gas Detector with HD Digital Display, Ideal for Home Kitchens, Hotel Rooms, RV Camping & Commercial Spaces From $15.32
From$1532
4-in-1 Indoor Air Quality Monitor – Plug-in CO & Gas Detector with HD Digital Display, Ideal for Home Kitchens, Hotel Rooms, RV Camping & Commercial Spaces
Kovex 6 in 1 Smoke, Gas & CO Detector, Indoor Air Quality Monitor with Full-Color Display, Rechargeable, Magnetic Base, Plug-In & Portable Design for Home, RV, Camper Van & Travel Trailer From $39.98
From$3998
Kovex 6 in 1 Smoke, Gas & CO Detector, Indoor Air Quality Monitor with Full-Color Display, Rechargeable, Magnetic Base, Plug-In & Portable Design for Home, RV, Camper Van & Travel Trailer
Portable Analyzer Multifunctional Intelligent O3 Meter Gas Detector Sensor Air Quality Pollution $72.15

$7215
current price $72.15Portable Analyzer Multifunctional Intelligent O3 Meter Gas Detector Sensor Air Quality Pollution
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