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  1. 3 IN 1 Portable LCD CO2 Meter Air Quality Carbon Dioxide Detector Tester Monitor

    eBay

  2. Newly upgraded 10-in-1 air detector with 24-hour battery life PM2.5 formaldehyde TVOC temperature and humidity CO2 detector

    Newly upgraded 10-in-1 air detector with 24-hour battery life PM2.5 formaldehyde TVOC temperature and humidity CO2 detector

    Aliexpress UK

  3. 6 in 1 Air Quality Monitor Home Office CO2 Meter HCHO CO TVOC PM2.5/10 Detector

    TVOC: 0-9.999mg/m³. HCHO detection range: 0-9.999mg/m³. PM2.5 detection range: 0-999ug/m³. 1 Air Detector. CO2 detection range: 400-5000PPM. ★ Four-color alarm: There are four different colors to show the different quality of the air being monitored: green for good air quality, and colors from yellow to orange to red for poor air quality.

    eBay

  4. Carbon Dioxide Detector, 5-in-1 Air Quality Detector Indoor CO2 Meter Digital.

    0 ~ 0.6 mg/m³ (HCHO formaldehyde). Large backlit LCD display, you can clearly see the amount of electricity, CO2, TVOC, HCHO, temperature and humidity. Sensor: NDIR infrared carbon dioxide sensor / semiconductor sensor.

    eBay

  5. FireAngel Carbon Monoxide Alarm Co2 FA3820 Detector

    Fire Angel FA3820 Carbon Monoxide Detector. This device is designed with advanced technology to detect the presence of harmful carbon monoxide gas in your living space.

    eBay

  6. 10 Year Life Carbon 1-10X Monoxide CO Detector with Battery CO2 Warning Sensor

    1xcarbon monoxide detector. Alarm current:<50mA. Red light:Alarm. This machine is 433mhz versio n, can be independent alarm. Life yellow light:Sensor life. Sensor life: 5-10 years. Battery life:at least 1 year.

    eBay

  7. Portable CO2 Detector Mini Indoor Carbon Dioxide Monitor NDIR Sensor Alarm LCD

    Superior infrared NDIR sensor with high precision, strong anti-interference, and excellent stability. High-Quality CO2 Detector. INKBIRDPLUS Portable Mini CO2 Detector. 1x CO2 Detector. ● CO2 Sound Alarm Range: (default) 1500 ppm.

    eBay

  8. CO2 Meter Air Quality Detector Air Test Carbon Dioxide Detector Tester

    0 ~ 0.6 mg/m³ (HCHO formaldehyde). Large backlit LCD display, you can clearly see the amount of electricity, CO2, TVOC, HCHO, temperature and humidity. Sensor: NDIR infrared carbon dioxide sensor / semiconductor sensor.

    eBay

  9. CO2 Digital Meter Humidity Detector Air Quality Dioxide Carbon Monitor Analyzer

    1 Air Quality Analyzer. The product is compact in size and easy to carry. The ventilation holes in the rear not only accelerate the convection between the air and the machine, so as to achieve effective detection, but also provides fine heat dissipation effect.

    eBay

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