CO2 Meter Air Quality Monitor 400-5000 PPM Sensor Carbon Dioxide

The Triplett GSM250 Desktop Indoor Air Quality CO2 Meter can be used to monitor air quality in office buildings, schools, exhibition halls, shopping malls, meeting rooms, fitness centers, restaurants and other public places. It simultaneously displays CO2, Temperature and Relative Humidity. It can be used on the desktop or wall mounted and has a display with a light bar for easy reading from long distances. A 3-color light bar (green / yellow / red) changes color with CO2 concentration.

Triplett GSM400 Portable Indoor Air Quality CO2 Meter

3 In 1 Air Quality Monitor, Portable CO2 Gas Analyzer, Temperature And Humidity Detector With Infrared Sensor From Windroid, $13.7

Air Monitor CO2 Carbon Dioxide Detector Portable Multifunctional LCD Digital Display Infrared/Semiconductor Sensor Gas Detector – the best products in the Joom Geek online store

EG CO2 Carbon Dioxide Air Quality Monitor, Pollution & Ventilation Meter, Detect & Test Indoor Air Ventilation CO2 ppm Levels, Humidity Sensor.

LFF CO2 Detector, Air Quality Monitor Carbon Dioxide Tester, Indoor CO2 Monitor with Dual Alarm and Customized Acoustic CO2 Alarm, Portable CO2 Meter with Temp Humi and Backlight for Various Occasion

KENTFAITH Smart CO2 Detector, Indoor Air Quality Monitor, NDIR Sensor Carbon Dioxide Detector, Temperature Humidity Air Tester for CO2 Alarm

5 in 1 CO2 Meter 400~5000 PPM Sensor Carbon Dioxide Detector Air Quality Monitor

Air Quality Monitor For CO2 Detector, Carbon Dioxide 400-5000 Ppm, Air Quality Tester For Room And Office - AliExpress

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: : Industrial