modMQ-2 - module with a sensor for concentration of combustible gases and smoke

A sensor that detects the concentration of ammonia. Equipped with a factory calibrated probe. It communicates via the I2C interface, UART or analog output. DFRobot SEN0469

Module with the MQ3 alcohol concentration sensor. The board is equipped with a Grove connector and communicates via an analog interface. Seeed Studio 101020006

Module with a sensor of formaldehyde (methanal) concentration in the air. The board is equipped with a Grove connector and communicates via the I2C or UART interface. Seeed Studio 101020972

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

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 natural gas and LPG concentration sensor (modMQ-5) allows the measurement of the concentration of natural gas, carbon monoxide, alcohol and methane. The module has an analogue output and an output triggered by exceeding the threshold of sensitivity.

Module with the MQ3 analog alcohol sensor. It enables gas detection and construction of a simple breathalyzer. The module is powered by 5 V and has an analog output. DFRobot SEN0128

A sensor that detects the concentration of hydrogen. Equipped with a factory calibrated probe. It communicates via the I2C interface, UART or analog output. DFRobot SEN0473

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

Air quality sensor module based on SGP30 system. The board has been equipped with Qwiic connectors. SparkFun SEN-16531

Module with ethanol sensor made in MEMS technology. It allows gas detection in the range of 1 to 500 ppm and has an analog output. DFRobot SEN0569

A sensor that detects the concentration of phosphine. Equipped with a factory calibrated probe. It communicates via the I2C interface, UART or analog output. DFRobot SEN0476

BOB-08891 - Gas Sensor Breakout Board

Module with gas sensor designed to monitor indoor air quality. It was based on the AMS CCS811 system that allows the detection of volatile organic compounds (VOCs) in the air. Digilent 410-386

Formaldehyde sensor (HCHO) dedicated to measuring ambient air quality. It is used to detect whether the surrounding environment exceeds a set concentration threshold. It is powered by a voltage of 5 V to 24 V and has an output in the form of a two-state digital signal. DFRobot SEN0595

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.