MQ-135 Gas and Air Quality Sensor
$1.50
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MQ-135 Gas and Air Quality Sensor
SKU: CPSEN005
MPN: NA
$1.50
Product Description
The MQ-135 is an air-quality gas sensor that uses SnO₂ material, whose conductivity increases when exposed to polluted air. It can detect harmful gases such as ammonia, benzene, sulfides, smoke, and CO₂ with good sensitivity and fast response. The module provides both analog (0–5V) and digital outputs, with an adjustable threshold using a built-in potentiometer. It operates on 5V and requires a short warm-up time for stable readings. Suitable for home safety, environmental monitoring, and general air-quality detection.
Product Specifications
- Heating voltage 5±0.2V (AC·DC)
- Operating current 150mA
- Circuit voltage ≤DC15V (maximum DC15V)
- Load resistance 1K (adjustable)
- Detection concentration range 100-20000 ppm (the range varies depending on the gas concentration)|
- Voltage in clean air ≤1.5V
- Sensitivity ≥3%
- Response time ≤1 second (preheating for 3-5 minutes)
- Response time ≤30 seconds
- Component power consumption ≤0.9W
- Operating temperature -10~50℃ (nominal temperature 20℃)
- Operating humidity 95%RH (nominal humidity 65%RH)
- Service life 5 years
- Dimensions 35mm × 22mm × 25mm
- Weight 7g
