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MQ-135 - Sensor for air quality
MQ-135 - Sensor for air quality
Content 1 Piece
€2.84 *
Item no: FUN-1010576

Available immediately, delivery time 2 to 4 working days

About the product
MQ-7 - Sensor for CO gas
MQ-7 - Sensor for CO gas
Content 1 Piece
€3.04 *
Item no: F23106822

Available immediately, delivery time 2 to 4 working days

About the product
MQ-2 Sensor for methane gas - with XH2.54 4P socket
MQ-2 Sensor for methane gas - with XH2.54 4P...
Content 1 Piece
€4.24 *
Item no: F23109076

Available immediately, delivery time 2 to 4 working days

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MQ-5 - Sensor for LPG and other natural gases
MQ-5 - Sensor for LPG and other natural gases
Content 1 Piece
€2.89 *
Item no: F23106848

Available immediately, delivery time 2 to 4 working days

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CCS811 Sensor for air quality, carbon monoxide, gases (VOC)
CCS811 Sensor for air quality, carbon monoxide,...
Content 1 Piece
€27.51 *
Item no: F23106999

Available immediately, delivery time 2 to 4 working days

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MQ-4 - Sensor for methane gas
MQ-4 - Sensor for methane gas
Content 1 Piece
€4.22 *
Item no: F23108567

Available immediately, delivery time 2 to 4 working days

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MQ-3 - Sensor for alcohol
MQ-3 - Sensor for alcohol
Content 1 Piece
€3.18 *
Item no: F23106855

Available immediately, delivery time 2 to 4 working days

About the product
- 9%
MQ-3 - Sensor for alcohol with XH2.54 3P socket
MQ-3 - Sensor for alcohol with XH2.54 3P socket
Content 1 Piece
€5.90 * €5.39 *
Item no: F23109053

Available immediately, delivery time 2 to 4 working days

About the product
- 15%
MQ-2 - Sensor for methane gas
MQ-2 - Sensor for methane gas
Content 1 Piece
€2.77 * €2.35 *
Item no: F23106456

Available immediately, delivery time 2 to 4 working days

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MQ-9 - Sensor for carbon monoxide and combustible gases
MQ-9 - Sensor for carbon monoxide and...
Content 1 Piece
€3.33 *
Item no: F23108555

Available immediately, delivery time 2 to 4 working days

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MH-Z19B - CO2 Sensor
MH-Z19B - CO2 Sensor
Content 1 Piece
€35.19 *
Item no: F23106440

Available immediately, delivery time 2 to 4 working days

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CO2 - Sensor - Comparable with MH-Z19B - with pin header
CO2 - Sensor - Comparable with MH-Z19B - with...
Content 1 Piece
€38.48 *
Item no: F23106853

Available immediately, delivery time 2 to 4 working days

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Gas sensors - small everyday heroes with a big effect

Gas sensors are used to detect gaseous substances in the ambient air. These particularly fine sensors serve a unique purpose, because gas sensors ensure our safety in everyday life: the measured values detected by the sensor are passed on to the microcontroller in the form of an electronic signal. Depending on the signal, the controller then activates warning devices that inform us when the ambient air is contaminated with a gas in harmful concentrations.  

How gas sensors work

Most gas sensors within microelectronics, for example the sensors of the MQ series, are based on a chemical measuring principle. Gas sensors therefore belong to the group of chemosensors.
The underlying functionality of the sensors is quickly explained: The sensor component is coated during production with a substance that reacts on contact with special gases. This changes the conductivity of the measuring surface. The degree of change is output in the form of an electronic signal.

Practical tip: CO2 traffic light with the MH-ZB19B sensor

In the context of the current pandemic situation, the monitoring of general air quality in closed rooms has become significantly more important. Here, too, gas sensors play an overriding role.
Many high (schools) have used the past year to produce so-called CO2 traffic lights with the students. The CO2 traffic lights usually consist of a gas sensor such as the MH-Z19B, a microcontroller and a traffic light. A previously defined threshold value serves as the basis for determining the air quality. If the CO2 level in the room air is particularly high, this is indicated by the red traffic light LED lighting up. If the amount of CO2 gas is low, the LED lights up green.
If you would like to build your own CO2 traffic light, you can find illustrated instructions on our learning platform www.funduino.de.

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