MQ135 Gas Sensor (Air Quality)

This air quality control sensor is used for the detection of pollution in the environment, it is usually implemented in control circuits such as alarms in houses, places where it is desired to prevent high levels of contamination at the aerobic level as industries that handle chemical compounds that can also be harmful for health, especially in air quality controlling equipment in buildings/offices. This sensor is responsible for the detection of gas concentration in various percentages, as are its analogues MQ-3/4/5. The output signal provided by the MQ-135 is dual, analog and digital. Regarding the analog signal provided, this comes to be directly proportional to the increase in voltage, in terms of the digital signal, it presents low levels of voltage, so this signal can be processed by a microcontroller, as an input or output, this already depends on the user's needs.

Main features:

• Model: MQ-135 (air quality)
• DC operating voltage: 5V
• Supply current: 150mA
• Analog and digital output
• wide detection range.
• Fast response and high sensitivity.
• single drive circuit.