Gas Sensor MQ135

Gas Sensor MQ135 - This module is made for Air Quality detection. You may use this module with 5v. You may integrate this module with different projects that have air quality monitoring in it. This module is sensitive to gases namely NH3(Ammonia), NOx (Nitrogen Oxide), Alcohol, Benzene, Smoke, and CO2 (Carbon Dioxide). This has 4 pins (Digital Pin, Analog Pin, VCC, GND) but you will only need three (either D or A) to operate.

Frequently Asked Questions AboutMQ-135 gas sensor

Q1: What is the MQ-135 gas sensor?

A: The MQ-135 gas sensor is a type of air quality sensor that is designed to detect a range of gases including ammonia, sulfur dioxide, nitrogen dioxide, and benzene.

Q2: How does the MQ-135 gas sensor work?

A: The MQ-135 gas sensor works by using a heating element to heat up a sensing material. When the sensing material interacts with a gas, it changes the resistance of the sensor, which can be measured and used to detect the presence of the gas.

Q3: What are the applications of the MQ-135 gas sensor?

A: The MQ-135 gas sensor is commonly used in air quality monitoring systems, gas leakage detection systems, and in applications related to indoor air quality.

Q4: How do I connect the MQ-135 gas sensor to an Arduino?

A: The MQ-135 gas sensor can be connected to an Arduino using three wires: VCC, GND, and an analog input pin. Connect VCC to 5V, GND to GND, and the analog input pin to the AO pin on the sensor.

Q5: How do I calibrate the MQ-135 gas sensor?

A: The MQ-135 gas sensor can be calibrated using a known concentration of the gas you want to detect. However, calibration can be difficult and may require specialized equipment.

Q6: What is the detection range of the MQ-135 gas sensor?

A: The detection range of the MQ-135 gas sensor can vary depending on the specific gas being detected and the concentration of that gas. However, the sensor is typically sensitive in the parts per million (ppm) range.

Q7: Can I use multiple MQ-135 gas sensors with one Arduino?

A: Yes, you can use multiple MQ-135 gas sensors with one Arduino by connecting each sensor to a separate analog input pin on the board.

Q8: How do I read the output of the MQ-135 gas sensor with an Arduino?

A: To read the output of the MQ-135 gas sensor with an Arduino, you can use the analogRead() function to read the voltage on the analog input pin connected to the sensor. You can then convert the voltage reading to a gas concentration using a conversion formula.

Q9: Can the MQ-135 gas sensor detect carbon monoxide?

A: No, the MQ-135 gas sensor is not designed to detect carbon monoxide. It is designed to detect gases such as ammonia, sulfur dioxide, nitrogen dioxide, and benzene. For carbon monoxide detection, a different type of gas sensor should be used.