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MQ-135 MQ135 Air Quality Sensor Hazardous Gas Detection Module For Arduino AVR

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MQ-135 MQ135 Air Quality Sensor Hazardous Gas Detection Module For Arduino AVR 
Module Applications: 
 Probe for home, environmental harmful gas detection device, suitable to ammonia , aromatic compounds , sulfur compounds , benzene vapor , smoke and other gases harmful gases , the gas sensitive element concentration range : 10 to 1000ppm 
Module Features: 
 1. Using high-quality dual-panel design, with power indicator and TTL signal output instructions; 
2. The switching signal having a DO (TTL) output and analog output AO; 
3. TTL output valid signal is low. ( Low-level signal when the output light can be directly connected to the microcontroller or relay module ) 
4. The higher the voltage , the concentration of the analog output voltage is higher. 
5. Air quality, hazardous gas detection with good sensitivity. 
6. There are four screw holes for easy positioning; 
7 Product dimensions: 32 (L) * 20 (W) * 22 (H) 
8. Has a long life and reliable stability 
9. Rapid response and recovery characteristics. 
Electrical properties: 
 Input voltage: DC5V Power consumption ( current ): 150mA 
DO output: TTL digital 0 and 1 ( 0.1 and 5V) 
AO output :0.1-0 .3 V ( relative to pollution ) , the maximum concentration of a voltage of about 4V 
Special note: After the sensor is powered , needs to warm up around 20S, measured data was stable, heat sensor is a normal phenomenon , because the internal heating wire , if hot is not normal. 
Wiring: 
1. VCC: positive power supply (5V) 
2. GND: power supply is negative 
3. DO: TTL switching signal output 
4. AO: analog signal output 

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产品详情

MQ-135 MQ135 Air Quality Sensor Hazardous Gas Detection Module For Arduino AVR 
Module Applications: 
 Probe for home, environmental harmful gas detection device, suitable to ammonia , aromatic compounds , sulfur compounds , benzene vapor , smoke and other gases harmful gases , the gas sensitive element concentration range : 10 to 1000ppm 
Module Features: 
 1. Using high-quality dual-panel design, with power indicator and TTL signal output instructions; 
2. The switching signal having a DO (TTL) output and analog output AO; 
3. TTL output valid signal is low. ( Low-level signal when the output light can be directly connected to the microcontroller or relay module ) 
4. The higher the voltage , the concentration of the analog output voltage is higher. 
5. Air quality, hazardous gas detection with good sensitivity. 
6. There are four screw holes for easy positioning; 
7 Product dimensions: 32 (L) * 20 (W) * 22 (H) 
8. Has a long life and reliable stability 
9. Rapid response and recovery characteristics. 
Electrical properties: 
 Input voltage: DC5V Power consumption ( current ): 150mA 
DO output: TTL digital 0 and 1 ( 0.1 and 5V) 
AO output :0.1-0 .3 V ( relative to pollution ) , the maximum concentration of a voltage of about 4V 
Special note: After the sensor is powered , needs to warm up around 20S, measured data was stable, heat sensor is a normal phenomenon , because the internal heating wire , if hot is not normal. 
Wiring: 
1. VCC: positive power supply (5V) 
2. GND: power supply is negative 
3. DO: TTL switching signal output 
4. AO: analog signal output 

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