MQ-135 Air Quality Gas Detection Sensor
MQ-135 Air Quality Sensor Hazardous Gas Detection Sensor Module Environmental Measurement
- Main chip: LM393,MQ-135 gas sensor
- With high sensitivity and good selectivity for air quality, harmful gas detection.
- With the DO switch signal (TTL) output and AO analog signal output
Product description
MQ-135 sensor introduction:
The gas sensitive material used with the MQ135 gas sensor is tin dioxide (SnO2), which has a lower conductivity in clean air. When contaminated gas is present in the environment
where the sensor is located, the conductivity of the sensor increases as the concentration of contaminated gas in the air increases. A simple circuit converts the change in conductivity into an output signal that corresponds to the gas concentration.
The MQ135 sensor is highly sensitive to ammonia, sulphides and benzene vapors and is also ideal for smoke and other harmful monitoring. This sensor can detect a variety of harmful gases, is a low-cost sensor for a variety of applications.
Module application:
It is suitable for the detection of harmful gases such as ammonia, aromatics, sulfides, benzene vapor, smoke and other harmful gas detection devices, gas sensor testing range of concentration: 10 to 1000ppm
Electrical performance:
Input voltage: DC5V Power consumption (current): 150mA
DO output: TTL digital quantities 0 and 1 (0.1 and 5V)
DO output: TTL digital quantities 0 and 1 (0.1 and 5V)
Dimension: 32 mm x 20 mm x 22mm
Reminded: After the sensor is powered on, you need to preheat about 20S, the measured data was stable, the sensor is a normal heating, because the internal electric wire, if the hot is not normal.
Wiring:
1. VCC: Positive power supply (5V)
2. GND: connect the negative power supply
3. DO: TTL switch signal output
4. AO: analog signal output
Package Included:
1*MQ-135 MQ135 Air Quality Sensor Hazardous Gas Detection Module
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