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Carbon Monoxide Detectors,CO Detector Battery Powered,Carbon Monoxide Alarm with Sensitive CO Sensor,LCD Display and Sound Warning,Complies with UL 2034 Standards
4.3
$23
Carbon Monoxide Alarm Detector,CO Gas Monitor Alarm Detector,CO Sensor with LED Digital Display, 85dB Sound Alarm for Home,Office (Batteries NOT Included) (1piece)
4.2
$21
SAF Aranet4 Home: Smart Indoor Air Quality Monitor - CO2, Temperature, Humidity, Portable & Battery-Powered, E-Ink Screen, Free App Integration
4.6
A$360
MG811 carbon dioxide sensor, CO2 sensor, gas sensor module
$66
Air Quality Monitor Indoor, 5 in 1 CO2 Monitor CO2 Detector Portable Air Quality Meter Carbon Dioxide Monitor with LCD Display, for Home Kitchen Office Car
$52
Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
4.7
A$59
INKBIRDPLUS Portable CO2 Detector, Mini Indoor CO2 Monitor, NDIR Sensor with Full Color LCD, for Home, Office, Travel (PTH-10C)
4.2
$105
INKBIRD INK-CO2W WIFI CO2 Monitor, 3 in 1 Indoor Air Quality Detector, Carbon Dioxide Meter Temperature Humidity Monitor, CO2 Alarm Meter, App Control, Backlit Screen
3.9
$142
SwitchBot Air Quality Monitor with Built-in Hygrometer,CO2 Detector,Temperature Humidity Monitor with APP, Bluetooth CO2 Monitor, 2-Year Data Storage SwitchBot Hub Required
4.4
$169
Brandson - CO2 Detector, Co2 Monitor Carbon Dioxide Detector Alarm, Co2 Sensor Digital USB, Indoor Air Quality Sensor Monitor with Temperature Humidity for Home Office Gym Car
3.8
$121
Besomi Electronics MQ-2 Gas Sensor Module Methane, Butane, LPG, Smoke Detector for Home and Industry High-Sensitivity Analog Output Gas Detection System Compatible with Arduino and Microcontrollers
3.0
$15
Black Air Quality Monitor Indoor CO2 Carbon Dioxide Detector Digital TVOC HCHO Monitor for Home Office
2.7
$35
FireangelCarbon Monoxide Alarm and Detector - FA6813 10-Year Sensor Life CO Alarm for Home with AA Batteries - Travel, Portable Carbon Monoxide Detector - CO Detector Monitor with Test Button
4.7
$39
Kidde5CO Battery Powered Carbon Monoxide Alarm 10 Year Life
4.7
A$52
Teyleten Robot SCD41 Gas Sensor Module CO2 Carbon Dioxide Temperature and Humidity Gas Sensor Module I2C
4.7
$51
SAF Aranet4 Home: Wireless Indoor Air Quality Monitor for Office or School (CO2, Temperature, Humidity and More) Portable, Battery Powered, E-Ink Screen, App for Configuration & Data History
4.7
A$504
KASTWAVE 4-in-1 CO2 Monitor with NDIR Sensor - Portable Air Quality Detector for Temperature, Humidity & CO2 Levels - Includes Alarm System for Homes, Offices, Travel & Cars
$138
Newentor CO2 Monitor, Air Quality Monitor Indoor Carbon Dioxide Detector with Voice Alert Large Display, Temperature Humidity, Alarm Clocks for Home, RV, Office, Classroom, 400-5000ppm, Black
4.3
$138
EC Buying GY-SGP30 Gas Sensor, Air Quality Carbon Dioxide Formaldehyde Monitoring TVOC CO2 Gas Sensor Module, a Digital Multi-pixel Gas Sensor for Indoor Air Quality Monitoring,co2 Sensor Arduino I2C
3.7
$35
INKBIRDPLUS Portable CO2 Detector Mini Indoor CO2 Monitor NDIR Sensor with Full Color LCD Indicator Light Alarm Auto Calibration for Home Office Travel
$83
Monitor, CO2 Detector Clear Display Auto Alarm Real Time Testing USB Charging for Office
$25
Carbon Monoxide Detectors, Carbon Monoxide Detector Plug in with Temperature Humidity Sensor Built-in, CO Level Monitor Alarm with Clear LCD Display Sound & Light Warning for Home/Hotel/RV
4.5
$62
SwitchBotMeter Pro CO2 Indoor Air Quality Monitor 6-in-1, CO2 Alarm, Large Display, Bluetooth Air Quality Tester for Home, Office, 2-Year Data Storage
$307
Temtop CO2 Monitor Indoor air Quality Monitor Portable CO2 Meter, CO2, Temperature, Humidity Home, Office or School
4.3
$105
Kidde 2030-DCR Compact 10 Year Life Carbon Monoxide Alarm with AA batteries
4.7
$40
Portable 4-in-1 Carbon Monoxide Detectors, Mini Carbon Monoxide and Carbon Dioxide Monitor with Magnetic Suction, RV CO CO2 Detector Alarm Temp/Humidity Sensor, CO CO2 Air Quality Monitor
4.3
$109
Mini CO2 Monitor, 3-in-1 Portable Carbon Dioxide Detector Temperature Humidity Air Analyzer, Stylish Highly Accurate CO2 Meter Sensor, Air Quality Monitor for Home Indoor Travel
$135
Professional Indoor Air Quality Monitor Indoor Portable CO2 Monitor | Temperature | Formaldehyde Detector | Humidity TVOC | Air Quality Tester - Confined Space Clean Air Monitor
$109
Air Quality Monitor, High Sensitivity CO2 Monitor Formaldehyde Detector, TVOC/Temp/Humidity Air Quality Monitor, with Buzzer Prompt, Max Value Highlight & 120s Countdown, Vent Design, Backlit Screen
$135
CO2 Monitor Carbon Dioxide Detector for Home, 3 Adjustable Volume for Alerts & 3 Adjustable Backlight, Photoacoustic Sensor for Temperature Humidity & Indoor Air Quality Monitor
4.9
$136
MH-Z19C Infrared Carbon Dioxide Sensor CO2 Air Quality Monitoring Concentration Detection Sensor Module with Terminals Cable UART PMW
$50
Sorandy9 in 1 Air Quality Monitor, Indoor PM2.5 PM10 AQI TVOC CO CO2 Temperature Humidity Detector, Air Quality Tester Air Pollution Meter for Home, Rooms, Offices, Grow Tents, SORANDY6YDF83NS7W
5.0
$95
Inkbird Digital CO2 Controller Carbon Dioxide Monitor IAQ Monitor with Sensitive NDIR CO2 Sensor and Plug-n-Play Design for Ventilation System, Building Control and HVAC Equipment - ICC-500T S01
3.7
$338
9 in 1 Indoor Air Quality Meters, 2000mAh WiFi Tester with Color LCD Screen, for PM2.5, PM10, HCHO, Organic Pollutants, CO, CO2
5.0
$67
UanTiiTuya Smart 2 In 1 Carbon Monoxide & Smoke Alarm Fire Alarm Smoke Detector Sensor WiFI Smoke Co Detector for Home Security Works with Smart Life App
3.2
$60
ICQUANZX MH-Z19 Infrared CO2 Sensor Module MH-Z19B Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B
3.7
$86
KASTWAVE CO2 Detector, CO2 Detector Air Monitor, Carbon Dioxide Detector with Temperature Humidity, USB Charger Air Quality Monitor Sensor Detector for Home Office Gym Car (Black)
2.8
A$39
INKBIRDPLUS Indoor CO2 Detector, Air Quality Monitor, Tester for Carbon Dioxide, Temperature and Relative Humidity, Indoor CO2 Monitor with Alarm, for Grow Tents, Wine Cellars, Homes, Cars(PTH-9C)
$137
Foloose Tuya WiFi Multifunctional Air Quality Meter Household HCHO TVOC Carbon Monoxide CO2 PM2.5 PM10 Tester Portable Temperature Humidity 2.8-inch TFT Display with Alarm Function
$59
HiLetgo ENS160+AHT21 Carbon Dioxide Sensor CO2 eCO2 VoCs TVOC Gas Sensor Temperature Humidity Sensor Air Quality Monitoring Sensor Replace CCS811
$23
Gywjioy CO2 Carbon Dioxide Detector,3 in 1 CO2 Meter(Temperature, Humidity and CO2 Value) Air Quality Monitor,Portable CO2 Monitorwith Alarm,for for Home, Office, motorhome,Grow Tents, Travel,Camping
5.0
$90
Newentor CO2 Monitor, Indoor Air Quality Meters, Carbon Dioxide Detector with Voice Alert, Large Display CO2 Tester, Temperature Humidity Sensor, Alarm Clock for Home, RV, Grow Tents, Black
4.3
A$138
InkbirdPlus Air Quality CO2 Monitor AK3 Indoor CO2 Meter Accurate Tester for Formaldehyde(HCHO) TVOC Temperature and Relative Humidity Real Time Gas Detector 350~2000ppm Range
3.7
A$142
TECNOIOT 1 Piece ENS160 + AHT21 CO2 eCO2 TVOC Temperature Humidity Sensor Air Quality
$32
CO2 Detector, CO2 Detector Air Monitor, Carbon Dioxide Detector with Temperature Humidity, USB Charger Air Quality Monitor Sensor Detector for Home Office Gym Car (Black)
$25
Asani Indoor Air Quality Monitor - 9-in-1 Portable Use for Home, Office - Detects 8 Major Air Pollutants Including CO2, VOC Sensor, Formaldehyde Tester - Room Temperature and Humidity Meter
4.4
$189
JESSINIE MICS-6814 Gas Sensor Module Air Quality Detection Sensor Carbon Monoxide CO Nitrogen Dioxide NO2 Ammonia NH3 Gas Detector Module for Arduino
3.6
$67
Newentor CO2 Monitor, Indoor Air Quality Meters, Carbon Dioxide Detector with Voice Alert, Large Display CO2 Tester, Temperature Humidity Sensor, Alarm Clock for Home, RV, Grow Tents, 400-5000ppm
4.3
$179
CO2 Controller Carbon Dioxide Controller CO2 Meter Monitor Day and Night Relay Function, NDIR CO2 Sensor for Green House, Grow Rooms, Factory, Home, Office
4.4
$330
MQ-135 Air Quality Sensor Detection Module
5.0
$12
Saraele Carbon Monoxide Temperature and Humidity Three-In-One Alarm Detector Real-Time Synchronous Detection of Carbon Monoxide Temperature and Humidity Data Suitable for Homes Apartments RVs (UKplug)
$177
Riiai CO2 Detector, Co2 Monitor Carbon Dioxide Monitor, Co2 Sensor Digital USB Charger Air Quality Sensor Detector with Temperature Humidity for Home Office Gym Car(White)
$241
Travel Carbon Monoxide Detectors, Portable Mini Air Quality Monitor, with Alarm Standable [3-in-1] CO Detector, RV CO Detector Alarm Temp/Humidity Sensor, for Trip, Camp, RV Car (Gray)
$107
DFROBOT Gravity: Analog CO2 Gas Sensor for Arduino
3.4
$105
UanTii Tuya WiFi Natural Gas Leak Detector LPG Leakage Sensor Sound Alarm & 433MHz Remote Control Protection Security Smart Home
3.6
$47
CO2 Carbon Dioxide Detector, Indoor Air Quality Monitor, Portable CO2 Monitor, Tester for Carbon Dioxide, Temperature & Relative Humidity, CO2 Meter with Alarm, for Home, Car, Grow Tents, Travel
$104
IQAir Air Quality Monitor [PM2.5 Particulate Matter, CO2 Meter, AQI, Temperature, Humidity], Smart Air Quality Meter [Wi-Fi, WLAN, App, 5” Display (12.7 cm)]
4.1
A$714
Hailege SCD41 CO2 Carbon Dioxide Gas Sensor Gas Detect Module Temperature Humidity Air Quality Monitoring Sensor I2C Communication 2.4-5.5V
$73
11-in-1 Portable Indoor Air Quality Monitor - Detects PM2.5, PM10, CO, CO2, HCHO, TVOV, Temperature & Humidity | Formaldehyde Sensor & Time Display - Comprehensive Home & Small Space Air Tester
$149
INKBIRDPLUS Indoor Air Quality Monitor Temperature And Relative Humidity Carbon Dioxide Detector Indoor CO2 Meter With Alarm Function CO2 Detector For Grow Tents Wine Cellars Homes Cars
3.9
A$138
MQ-7 CO Carbon Monoxide Coal Gas Sensor Module
$15
Azonee Air Quality Monitor, CO2 Monitor, Humidity Temperature Meter, Air Quality Tester, Professional & Accurate CO2, TVOC, HCHO, Humidity& Temperature Particle Counter, for Home, Office, School
1.0
$87
RIV International 3 Pcs x IR Infrared Obstacle Avoidance Sensor Module for Arduino
5.0
$26
BROLEOPortable Gas Detector, H2S, O2, CO and LEL 4 Gas Monitor with Sound Light Vibration Gas Alarm, LCD Display Rechargeable Multi Gas Leak Detector Air Quality Tester for Home, Kitchen
$144
TEKCOPLUSPortable Digital Temperature Humidity Indoor 9999ppm NDIR Sensor IAQ CO2 Monitor Wet Bulb Temperature (WB) Dew Point (DP) Tester CO2 Monitor for Indoor Air Quality (IAQ) Diagnosis
4.4
$284
CO2 Detector, Co2 Monitor Carbon Dioxide Monitor, Co2 Sensor Digital USB Charger Air Quality Sensor Detector with Temperature Humidity for Home Office Gym Car(White)
2.7
$49
KASTWAVE Air Quality Monitor Indoor, Portable CO2, Formaldehyde, Temperature, Humidity Detector with Audible and Visual Alarm for Home, Office and School, Real Time Test, Battery Powered
$90
Andoer 5pcs IR Infrared Sensor Module Obstacle Avoidance Module Board Smart Car Robot
4.4
$14
Airthings 2960 View Plus - Radon and Air Quality Monitor with PM 2.5, CO2, VOC, Humidity and Temperature Detector, Mobile APP, Wi-Fi , Notifications
4.1
A$624
CO2 Monitor, CO2 Air Quality Tester, CO2 Detector Carbon Dioxide Monitor, CO2 Measuring Device, Rechargeable Carbon Dioxide Detecting Tool, Wireless Air Quality Monitor for Home, Office or School
$103
GY-BMP280-3.3 High Precision Atmospheric Pressure Sensor Module for Arduino Board
$51
CO2 Detector Upgraded Mini CO2 Monitor Meter Portable Multi-Function 5-in-1 Air Quality Monitor Carbon Dioxide Detector Temperature and Humidity Detector Travel-Size for Home Indoor Outdoor
$96
CO2 Carbon Dioxide Detector, 4-in-1 Indoor Air Quality Monitor, Portable CO2 Monitor, Tester for Carbon Dioxide, Temperature and Relative Humidity, CO2 Meter with Alarm, for Grow Tents, Homes, Cars
$94
Gas Detection Sensor MQ2 Module
5.0
A$15
Original SCD30 CO2 Sensor, Module Carbon Dioxide Sensor Gas Temperature and Humidity Sensor SCD30 IC Module
$80
CO2 Monitor, CURCONSA CO2 Meter Indoor Air Humidity and Clock Dual Channel NDIR CO2 Sensor 3.5 Inch TFT Colour Screen with Capacitive Touch 0~5000PPM
4.1
$290
Kocusu CO2 Monitor,Air Quality Monitor Indoor with LED Display,6 in 1 CO2 Detector Sensor,Carbon Dioxide Detector with Temperature,Humidity,HCHO,TVOC,PM2.5 for Home,Office,Car (White)
$69
GAIN EXPRESS CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter
4.4
$326
GAIN EXPRESS CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter
4.5
$328
CO2 Detector 3 in 1 Carbon Dioxide Detector, Portable CO2 Sensor with LCD Display, Temperature and Humidity Meter with Alarm Carbon Monoxide Meter Carbon Monoxide Detectors for Home 400-5000ppm Black
$57
CO2 Detector Monitor Air Quality Indoor, Kethvoz Mini Carbon Dioxide NDIR Sensor Detect CO2 Gas with Alarms, Display Temperature Humidity for Indoor Home Office Car Grow Tent
4.3
$98
Youmile Temperature And Humidity Sensor ENS160+AHT21 Carbon Dioxide CO2 eCO2 TVOC Air Quality module 3 in 1 sensor High-Precision with Dupont cable,for Arduino
4.5
$31
LSENLTY Portable CO2 Detector, 2s Refresh High Accuracy Carbon Dioxide Monitor, 3 in 1 CO2 Meter(Temperature, Humidity and CO2 Value), 96 Hours Standby Time CO2 Monitor for Travel Camping Home Office
4.2
$123
KocusuCO2 Monitor with LCD Display,Air Quality Monitor Indoor,3 in 1 CO2 Detector Sensor,Carbon Dioxide Detector with Temperature,Humidity for Home,Office,Car (Black)
2.0
$49
Carbon Monoxide Detector CO Alarm with 10 Year Sealed Battery LCD Digital Display and Sound Warning for Home Office safety EN50291
4.6
$59
Kocusu CO2 Monitor with LCD Display,Air Quality Monitor Indoor,6 in 1 CO2 Detector Sensor,Carbon Dioxide Detector with HCHO,TVOC,PM2.5,Temperature,Humidity for Home,Office, (White)
$152
Carbon Dioxide Detector, Bekasa 5-in-1 Air Quality Monitor Detector Indoor CO2 Sensor Digital TVOC HCHO Monitor Temperature Humidity Tester Backlight Display for Home Office Gym (Black)
2.5
$59
Smart Air Quality Monitor: WiFi Indoor Air Quality Meter Detects CH2O, CO2, VOC, Temperature and Humidity, App Control, Thermometer Humidity Monitor For Smart Home Automation
3.3
$75
X-Sense Carbon Monoxide Detector, Replaceable Battery Powered CO Alarm with Digital Display, Portable Carbon Monoxide Alarm for Home with CO Peak Value Memory, XC0C-SR
4.7
$44
Awair Element CO2 Monitor, Air Quality Monitor, Indoor Air Pollution Sensor, Temperature, PM2.5, VOCs, Real-Time Tracking, iOS/Android App, Comprehensive Home Air Monitoring for a Healthy Environment
4.2
A$290
CO2 Detector, Portable CO2 Meter CO2 Monitor Indoor 0-9999ppm Carbon Dioxide Detector with NDIR CO2 Sensor, Air Quality Tester for Carbon Dioxide, Humidity & Temperature
$351
Inkbird Digital CO2 Controller Carbon Dioxide Monitor IAQ Monitor with Sensitive NDIR CO2 Sensor and Plug-n-Play Design for Ventilation System, Building Control and HVAC Equipment - ICC-500T S01
3.8
$362
Netatmo Smart Indoor Air Quality Monitor (temperature, humidity, noise and CO2 sensors), NHC-UK
4.0
A$193
LifeBasis Air Quality Monitor 10-in-1 CO2 Monitor Rechargeable with Stand Real-Time AQI,PM1.0,PM2.5,PM10,TVOC,HCHO,Particles,Temp and Humidity Air Quality Detector Indoor for Home Office School
4.4
$217
Metriful CO2 Monitor with Alarm, Carbon Dioxide Air Quality Detector for Home and Work, Mute and Dim Functions, Adjustable Thresholds, Rechargeable Battery, NDIR Sensor
3.4
$82
Kidde 5DCO 10 Year Life Battery Powered Digital Display Carbon Monoxide Alarm
4.7
A$56
Airthings 2930 Wave Plus - Radon and Air Quality Monitor with CO2, VOC, Air Pressure, Humidity and Temperature Detector
4.2
$384
Mqjbhyf 4-In-1 Digital CO2 Meter Measure Carbon Dioxide Humidity Temperature TVOC Sensor Tester CO2 Air Quality Monitor Detector
2.2
$33
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![Travel Carbon Monoxide Detectors, Portable Mini Air Quality Monitor, with Alarm Standable [3-in-1] CO Detector, RV CO Detector Alarm Temp/Humidity Sensor, for Trip, Camp, RV Car (Gray)](https://m.media-amazon.com/images/I/71gVj8GyjTL.jpg)
![IQAir Air Quality Monitor [PM2.5 Particulate Matter, CO2 Meter, AQI, Temperature, Humidity], Smart Air Quality Meter [Wi-Fi, WLAN, App, 5” Display (12.7 cm)]](https://m.media-amazon.com/images/I/61+V4PVU0ML.jpg)
