MQ-135 alcohol, benzine, ammonia sensor*

Module with sensor MQ-135 detecting benzene, alcohol and smoke. It is powered with the voltage from 2.5 V to 5 V. It has digital and analog output, making it compatible with most commissioning modules, including the Arduino.

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Price 19,90 zł

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The sensor detects the concentration of benzene, alcohol and smoke in the air, the result can be obtained measuring the voltage on the analog output. The system is supplied with the voltage from 2.5 V to 5 V. It has a digital and analog output, making it compatible with most of the commissioning modules including Raspberry Pi and Arduino.


  • Power supply: from 2.5 V to 5 V
  • Analog and digital output
  • Pins: goldpin connectors of 2.54 mm raster
  • Board sizes: 33 x 20 mm
  • It has mounting holes with the diameter: 3 mm


Specifications and other detailed information can be found in the documentation.


The product is compatible with Arduino

In the web, you can find sample programs for Arduino and STM32.



The digital output D0

With the help of the potentiometer placed on the reverse side of the board, set is the threshold above which the output D0 is changed from a high to a low status. The output D0 can be linked directly with a microcontroller or commissioning set, including Arduino, or for example, with a module of a buzzer which will signal too low or high level of gases in the air.


Analog output A0

The sensor has an analog output A0 which must be connected to the pin of the converter A/D (of analog input in Arduino). This will allow you to measure the proportional voltage signal and more accurately determine the concentration.

  • Sensor - service module


Posting the payment for the order on our account on a business day up to 13:00 means sending the goods on the same day!


The time of payment depends on the hours of ELIXIR session of the sender's bank and the recipient of the transfer (more information on this subject, for example on the website


The table presents available forms of delivery in Poland


Carrier and

Bank wire

by cash


Poczta Polska

terms of service

9,90 PLN17,90 PLN1-3 days

Kurier GLS

terms of service

14,90 PLN22,90 PLN

1-2 days

Paczkomaty 24/7 

terms of service

12,90 PLN-1-3 days

If the amount to pay for products exceeds 500 PLN
Delivery is for free!


  • Free delivery of orders over 500 PLN does not apply to parcels addressed outside of Poland.
  • Free delivery does not apply when changing orders.
  • The delivery period is counted in working days from the date of dispatch of the order.