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  1. Carbon Dioxide Detector CO2 Smart Digital Meter Indoor Humidity Sensor Tester

    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. 1x Air Quality Detector.

    eBay

  2. 5-in-1 Air Quality Detector CO2 Detector Formaldehyde Monitor for Indoor Outdoor

    Comprehensive 5-in-1 Detection: This air quality monitor monitors CO2, VOCs, formaldehyde, temperature, and humidity simultaneously. User-Friendly Operation: Easily power the CO2 detector on or off with a 3-second press of the button.

    eBay

  3. Household Air Quality Detector Multifunctional T/H Sensors CO2 Tester LCD A9B7

    This is a kind of quality air quality detector, compact size, lightweight and portable. Large LCD display, you can see the electricity quantity, CO2 value, TVOC value, HCHO value, temperature, and humidity clearly.

    eBay

  4. Air Quality Tester Air Quality Detector 12 In 1 CO2 HCHO TVOC PM2.5 PM10

    1 x Detector. Item Type: Air Quality Tester. Sensor: Semiconductor Sensor, Infrared Sensor. 1 x USB Cable.

    eBay

  5. Laser Tools Engine CO2 Leak Detector Fluid Tool Tester Check Cylinder Head Leaks

    Once fitted to the running engine's coolant filler neck the rubber bulb is used to suck the gasses that collect in the top of the filler bottle through the fluid in the tester. If there is CO2 in the gases it will turn the fluid green indicating a blown head gasket or similar issue.

    eBay

  6. Combustion Leak Tester KIT Head Gasket tester PETROL 500ml Fluid CO2 Detector

    Reaction fluid 500ml. Start the engine (preferably when it is warm), increase the speed to obtain a higher combustion pressure. Connect the tester to the opening of the expansion tank or cooler. When testing, do not allow the coolant to mix with the reaction fluid.

    eBay

  7. Air Quality Detector 5 In 1 CO2 TVOC HCHO Temperature Humidity Detection

    [Easy to Operate] Simply press the power key for 3 seconds to turn on or off the air quality detector, which automatically starts detection once turned on. Item Type: Air Quality Detector. 1 x Air Quality Detector.

    eBay

  8. Tuya Smart Wifi CO2 Sensor Smart Carbon Dioxide Meter Temperature Humidity Detec

    Easily integrate with Tuya smart devices to create customized scenes. For instance, link it to a smart widow pusher and, when CO2 reaches a warning level, it automatically opens the window. Temperature and humidity settings also available for a safer, smarter lifestyle.

    eBay

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