MQ-135 Air Quality Sensor – X2 Robotics in Canada

MQ-135 Air Quality Sensor

The MQ-135 air quality sensor is extremely sensitive to ammonia,
sulfide, bernze, smoke, and other harmful gas. The resistance of the
sensitive component changes as the concentration of the gas changes
making it ideal for air quality control applications. The tested
concentration range from 10 to 1000ppm.

Features:

• Using a simple circuit can change the conductivity Conversion of an output signal corresponding to the gas concentration

• Sensitive material MQ135 gas
  sensor is used in clean air low conductivity tin oxide (SnO2). When the
  sensor is kept in their environment In the polluting gases, the
  conductivity sensor with increasing air pollution in gas concentration
  increases

• MQ135 sensor for ammonia, sulfide, benzene vapor high sensitivity of
  the smoke and other harmful monitor is also very good. This sensor can
  be seized measure a variety of harmful gases, is a low-cost sensors for
  a variety of applications

Specification:

• It adopts high quality double panel design with power indication and TTL signal output indication

• It has DO switch signal (TTL) output and AO analog signal output

• The TTL output valid signal is low. (When the output is low, the signal
  light is on, it can be directly connected to the MCU or relay module)

• The voltage of the analog output, the higher the concentration, the higher the voltage

• It has good sensitivity to gas and natural gas detection

• There are four screw holes for easy positioning

• Has a long service life and reliable stability

• Fast response recovery characteristics

Technical Details:

• Detection of Gas: Ammonia/Sulfide/Benzene vapor

• Detection of Concentration: 10-1000ppm

• Input Voltage: DC5V

• Power Consumption (current): 150mA

• DO Output: TTL digital quantities 0 and 1 (0.1 and 5V)

• AO Output: 0.1-0.3V (relatively non-polluting), the highest concentration voltage is about 4V

• Using the Chip: AT89S52

• Crystal: 11.0592MHZ

• Baud Rate: 9600

Note: After the sensor is energized, it needs to
be preheated for about 20S, and the measured data is stable. The
heating of the sensor is a normal phenomenon, because there is a heating
wire inside, if it is hot, it is not normal.

We also carry: