Packaging Details
- Unit Type:piece
- Package Weight:0.03kg (0.07lb.)
- Package Size:1cm x 1cm x 1cm (0.39in x 0.39in x 0.39in)
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MQ-135 Air Quality Sensor Hazardous Gas Detection Module MQ135 Sensor For Arduino
The MQ135 gas sensor uses a gas sensitive material with a lower conductivity of two tin oxide (SnO2) in clean air. When there is contamination gas in the environment of the sensor, the conductivity of the sensor increases with the increase of the concentration of the polluted gas in the air. A simple circuit is used to convert the electrical conductivity into an output signal corresponding to the gas concentration.
MQ135 sensors are highly sensitive to ammonia, sulfide, and benzene vapors, and are ideal for monitoring smoke and other harmful substances. The sensor, which detects a wide range of harmful gases, is a low-cost sensor for a wide variety of applications.
Module features:
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It adopts high quality double panel design, with power indication and TTL signal output indication;
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It has DO switch signal (TTL) output and AO analog signal output;
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The TTL output valid signal is low. When the output is low, the signal light is on, and the microcontroller or relay module can be directly connected
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Analog output voltage, the higher the concentration, the higher the voltage.
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It has good sensitivity to air quality and harmful gas detection.
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There are four screw holes for easy positioning;
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Product dimensions: 32*20*22mm
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With long service life and reliable stability
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Fast response recovery feature
Electrical performance:
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Input voltage: DC5V power dissipation (current): 150mA
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DO output: TTL, numeric quantities 0 and 1 (0.1 and 5V)
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AO output: 0.1-0.3V (relatively pollution-free), the highest concentration of about 4V voltage
Special reminder: after the sensor is energized, you need to preheat 20S or so, the data to be stable, sensor heating is a normal phenomenon, because the internal heating wire, if hot, it is not normal.
Connection mode:
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VCC: power supply positive pole (5V)
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GND: power supply negative pole
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DO:TTL switch signal output
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AO: analog signal output
Module application:
For the family environment, harmful gas detection device is suitable for the detection of aromatic compounds in ammonia, sulfide, benzene, steam, smoke and other harmful gas gas, gas sensitive element concentration range: 10 to 1000ppm
1*MQ-135 Air Quality Sensor
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