Gravity: Analog Alcohol Sensor (MQ3) - module with an alcohol sensor

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

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

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

Module with BME680 for measuring the concentration of VOC, pressure, temperature and humidity. Equipped with a STEMMA QT connector, it communicates via I2C or SPI. Adafruit 3660

A digital gas and air quality sensor that measures eCO2, TVOC, and the AQI air quality index. The device utilizes metal-oxide technology with four sensor sections and an embedded microcontroller, simplifying operation and integration with Arduino, Raspberry Pi, and CircuitPython platforms. The sensor supports I2C and SPI interfaces, as well as temperature and humidity compensation using an external sensor. The compact design and STEMMA QT/Qwiic standard allow for easy integration into projects. Adafruit 6431

Module with a BME680 sensor that allows you to measure temperature, humidity, pressure and gas detection. The board is equipped with a Grove connector and communicates via I2C and SPI. Seeed Studio 101020513

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

Module with an analog MQ7 carbon monoxide sensor. It is powered with the voltage of 5 V and has an analog output. DFRobot SEN0132

Module with MQ5 LPG concentration sensor. The board is equipped with a Grove connector and communicates via an analog interface. Seeed Studio 101020056

Module with hydrogen sulphide sensor made in MEMS technology. It allows gas detection in the range of 0.5 to 50 ppm and has an analog output. DFRobot SEN0568

Module with the MiCS-5524 analog gas sensor. It allows you to measure the concentration of CO, CH4, 2H5OH, C3H8, C4H10, H2, H2S and NH3. DFRobot SEN0440

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 a knock-on sensor for measurement of methane, propane and carbon monoxide (MQ-9) concentrations. The module has an analogue output and an output triggered by exceeding the threshold of sensitivity.

Module with an analog MQ4 methane sensor. It is powered with the voltage of 5 V and has an analog output. DFRobot SEN0129

Module with a gas concentration sensor MQ9, which enables the detection of carbon monoxide and combustible gases (methane, propane). The board is equipped with a Grove connector and communicates via an analog interface. Seeed Studio 101020045

Air quality sensor module based on the SGP40 system. It uses CMOSens technology by Sensirion and provides information on the concentration of volatile organic compounds (VOC). Adafruit 4829