SAF
SAF Aranet4 Home: Wireless Indoor Air Quality Monitor for Home, Office or School (CO2, Temperature, Humidity and More) Portable, Battery Powered, E-Ink Screen, App for Configuration & Data History
Netatmo
Netatmo Weather Station Indoor Outdoor with Wireless Outdoor Sensor - Compatible with Amazon Alexa & Apple HomeKit, NWS01-EU
Inkbird
INKBIRD Smart Indoor Air Quality Monitor IAM-T1, Electronic Ink Display, CO2 Level Indication, App Monitor Temperature Relative Humidity Air Pressure, 4 Years Battery Life for Home Office School Cafe
Netatmo
Netatmo Smart Indoor Air Quality Monitor (temperature, humidity, noise and CO2 sensors), NHC-UK