.png)
Soldered MQ138 - volatile organic compound sensor with Qwiic
ID: 1208290
zł124.16
Tax included
zł100.94 tax excl.
MQ138 sensor breakout for monitoring air quality and detecting volatile organic compounds, including benzene, toluene, acetone and formaldehyde. Equipped with an ATtiny404 microcontroller and two Qwiic connectors, it communicates over I2C and operates from a 3.3V supply. Provides approximate gas level readings for monitoring changes in air pollution. Soldered 333128
Description
The device MQ138 from Soldered is an air quality sensor breakout for detecting volatile organic compounds such as benzene, toluene, acetone and formaldehyde. Its semiconductor sensing element changes resistance when exposed to gases in the surrounding air. These readings can be used to monitor changes in air pollution levels and develop systems that respond to increasing concentrations.
The onboard ATtiny404 microcontroller reads the sensor signal and provides data over I2C. Two Qwiic connectors, compatible with easyC and STEMMA QT, allow the module to connect to a compatible controller board and additional devices on the same bus without soldering. The default I2C address is 0x30, and onboard switches allow it to be changed within the 0x30–0x37 range.
The manufacturer provides an Arduino library with reading and calibration examples. Gas concentration is estimated in software using the response characteristics of the selected gas. Since the sensor responds to multiple substances, readings are approximate and cannot independently determine the concentration of individual components in a mixture. According to the setup instructions, the sensor should be preheated for approximately 48 hours and then calibrated in clean air.
Features
- Sensor and measurements
- Sensing element: MQ138
- Sensor type: semiconductor, resistive
- Detected substances according to the manufacturer's description: benzene, toluene, acetone and formaldehyde
- Estimation of the selected gas concentration using the Arduino library
- Microcontroller and communication
- Microcontroller: ATtiny404
- Communication interface: I2C
- Connectors: 2 × Qwiic, compatible with easyC and STEMMA QT
- Default I2C address: 0x30
- Address range selectable using onboard switches: 0x30–0x37
- Power supply
- Module supply voltage: 3.3V
- Software
- Arduino library and examples provided by the manufacturer
- Support for calibration and configuration of calculation parameters for the selected gas
- Mechanical specifications
- Board dimensions: 54 × 22mm
- Four mounting holes for M3 screws
1208290
Data sheet
- Interface
- I2C
- Type of sensor
- MQ138
- Power supply voltage
- 3,3 V
- Concentration measurement
- VOC
Other products in the same category (16)
PMS7003 is a kind of digital and universal particle concentration sensor, which can be used to obtain the number of suspended particles in the air, i.e. the concentration of particles, and output them in the form of digital interface
zł113.47
24h
Available quantity: 3
Available
The sensor is designed for indoor air quality testing. The main gas detected is carbon monoxide, alcohol, acetone, thinner, formaldehyde and other slightly toxic gases. It is compatible with 5V and 3.3V power supply. Seeed Studio 101020078
zł58.12
24h
Available quantity: 2
Available
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
zł193.38
24h
Available quantity: 2
Available
The module allows the detection of volatile organic compounds (VOC) in the air, based on Winsen\'s WSP2110 system. Allows for detection in the air; formaldehyde (HCHO), methane, benzene, toluene, alcohol, etc. The sensor output is an analog signal. Seeed studio 101020001
zł79.32
24h
Available quantity: 4
Available
Laser sensor of air pollution with particles PM1,0, PM2.5 and PM10. It allows for precise analysis of the amount of pollutants in the environment, has small dimensions and a built-in silent transfer fan. Data is output to the UART interface. Planter PMSA003-C
zł105.17
4 weeks
No product available!
Laser sensor of air pollution with PM2,5 and PM10 particles. It allows for precise analysis of the amount of pollutants in the environment, has small dimensions and a built-in silent transfer fan. The data is output to the UART interface and via the PWM signal. The set includes a UART-USB converter. Nova Fitness SDS011
zł164.87
4 weeks
No product available!
Laser sensor of air pollution with PM2,5 and PM10 particles. It allows for precise analysis of the amount of pollutants in the environment, has small dimensions and a built-in silent transfer fan. The data is output to the UART interface and via the PWM signal. Nova Fitness SDS018
zł131.02
24h
Available quantity: 3
Available
Module with SGP30 gas sensor. The sensor communicates via the I2C interface. SGP30 system contains several elements reacting to various metal oxides, which allows for more accurate determination of air quality. Adafruit 3709
zł111.60
24h
Available quantity: 1
Available
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
zł174.70
24h
Available quantity: 1
Available
PM2.5 dust sensor powered by 5V, communication via the UART interface. Sharp GP2Y1051AU0F
zł42.90
24h
Available quantity: 4
Available
Total suspended particulate (TSP) sensor that allows you to measure the particle concentration from 1 to 100 μm. SDS198
zł415.63
24h
Available quantity: 1
Available
Air quality sensor module based on SGP30 system. The board has been equipped with Qwiic connectors. SparkFun SEN-16531
Regular pricezł140.15zł89.02
24h
Available quantity: 3
Available
Module with sensors of environmental parameters. It allows you to measure temperature, humidity and pressure as well as CO2 and VOC concentration. DFRobot SEN0335
zł132.62
24h
Available quantity: 2
Available
Sharp GP2Y1010AU0F dust and particle concentration sensors. It is supplied with the voltage from 5 to 7V. Has an analog output. DFRobot SEN0144
zł61.46
24h
Available quantity: 4
Available
Module with PM2.5 HM3301 dust sensor. The board is equipped with a Grove connector and communicates via the I2C interface. Seeed Studio 101020613
zł150.23
24h
Available quantity: 1
Available
Module with air quality sensor SGP30. The board is equipped with a Grove connector and communicates via the I2C interface. Seeed Studio 101020512
zł49.16
24h
Available quantity: 3
Available
MQ138 sensor breakout for monitoring air quality and detecting volatile organic compounds, including benzene, toluene, acetone and formaldehyde. Equipped with an ATtiny404 microcontroller and two Qwiic connectors, it communicates over I2C and operates from a 3.3V supply. Provides approximate gas level readings for monitoring changes in air pollution. Soldered 333128