MH-Z19E https://www.winsenprotech-sensorinstruments.com/sensors/co2-sensor/mh-z19e.htmlprotmex-pth-9c-ndir-air-quality-co2-meter-desktop-temperature-humidity-with-lcd-screen-netherlands-belgium-eu-product/
MH-Z19E https://www.winsenprotech-sensorinstruments.com/sensors/co2-sensor/mh-z19e.htmlprotmex-pth-9c-ndir-air-quality-co2-meter-desktop-temperature-humidity-with-lcd-screen-netherlands-belgium-eu-product/