Mq 135 Kullanımı. I had bought 3 mq 135 gas sensors on aliexpress to test if it is possible to measure co2 with them. Since ao is a varying voltage this pin should be connected to one analog input of a microcontrollerthe do pin is an open collector digital output but with a pull up resistor onboard that becomes low when the detection level exceeds a predefined level.
We recommend that you calibrate the detector for 100ppm nh3 or 50ppm. Contribute to georgkmq135 development by creating an account on github. It is with low cost and particularly suitable for air quality.
There is a sensitive layer which has lower conductivity in.
Sensitive for benzene alcohol smoke. The mq 135 gas sensors are used in air quality control equipments and are suitable for detecting or measuring of nh3 nox alcohol benzene smoke co2. Electric parameter measurement circuit is shown as fig2 e. The mq 135 gas sensor is a low cost to purchase.