Air Monitoring on ESP32, using BME680 and CCS811 environmental sensors. Sensor data on this channel may not be calibrated.

sensor: DHT11,MQ-9,MQ-135,Sonar sensor

Arduino Mega 2560 + GSM Sim900

CCS811 (T/H compensated with ENS210)

My own device based on ESP8266. Sensor for temp, humm and pressure is BME280. Second sensor is MH-Z19 for CO2 concentration. Device located at office or home, Moscow, Russia.

E+E EE871 Sensor CO2 Measuring principle non-dispersive infrared technology (NDIR)

Weatherduino Pro2 Plus Air Quality Monitor

iAQ-core indoor air quality sensor

Data presented here is from an WeatherDuino - Air Quality Monitor development system.

LoRa CO2 sensor demo

Data from Air Quality Sensors connected to a WeatherDuino Pro2 PLUS system by Werk_AG

AQI index computed from a WheatherDuino station

This Is data from a Weatherduino ProPlus Air Quality Monitor

Measuring of CO2 concentration, relative humidity, temperature and atmospheric pressure

Essai ESP8266-12E