MQ-5 Flammable Gas Sensor Module - Waveshare 9531

The MQ-3 sensor allows you to measure the concentration of alcohol vapors. The measuring range of the sensor is in the range of 0.05 mg / L to 10mg / L, and an analogue signal is obtained at the output.

Air quality sensor module based on the ENS160 system. It communicates via the I2C interface (Gravity connector). DFRobot SEN0514

Integrated gas sensor, pressure, humidity and temperature in the LGA-8 housing. Bosch Sensortec BME680

The MQ-8 sensor allows the measurement of hydrogen concentration in the air. The measuring range of the sensor is in the range of 100 - 10,000 ppm.

Digital gas sensor solution that senses a wide range of Total Volatile Organic Compounds (TVOCs), including equivalent carbon dioxide (eCO2) and metal oxide (MOX) levels, intended for indoor air quality monitoring in personal devices such as watches and phones, but we’ve put it on a breakout board so you can use it as a regular I2C device. SEN-14193

The module with the sensor for the measurement of the concentration of carbon monoxide (MQ-7), allows the measurement of the concentration of carbon (CO) in the air. The module has an analogue output and an output triggered by exceeding the threshold of sensitivity.

Module with ozone detection sensor. It performs measurements up to 10 ppm with a resolution of 0.01 ppm. It has a UART output and an analog output. ZE25-O3

Module with an oxygen concentration sensor in the environment. It allows you to measure the volume of oxygen in the range from 0 to 100%. It communicates via the I2C interface. DFRobot SEN0496

A sensor used to detect air pollutants by measuring VOCs and gases such as ammonia or hydrogen sulfide. It is used in various areas, such as the food industry, chemical industry, air quality control in laboratories and environmental monitoring. Figaro TGS2602

Module with an analog MQ8 hydrogen sensor. It is powered with the voltage of 5 V and has an analog output. DFRobot SEN0133

Carbon monoxide sensor module made in MEMS technology. It allows gas detection in the range of 5 to 5000 ppm and has an analog output. DFRobot SEN0564

Module with gas sensor SGP30. It allows you to measure the content of total volatile organic compounds (TVOC), carbon dioxide equivalent (eCO2), ethanol and H2 in the air. M5Stack U088

Gravity: UART Infrared CO2 Sensor is a high precision CO2 sensor. It uses the UART interface for communication. It allows to measure CO2 content in the air in the range of 0 ... 50000ppm. DFRobot SEN0220

The SCD-40 CO2, temperature and humidity sensor module provides high accuracy readings. It is equipped with a Qwiic connector and communicates via an I2C interface. SparkFun SEN-22395

Gravity: Analog Infrared CO2 Sensor is a high precision analogue CO2 sensor. It measures CO2 content in the range of 0 ... 5000ppm and is compatible with all devices with ADC function. DFRobot SEN0219

Module with CO2, temperature and humidity sensor SCD-30. Equipped with a STEMMA QT connector, it communicates via the I2C interface. Adafruit 4867