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Home / Sensors & Modules / MQ135 Gas Sensor for Arduino/Raspberry Pi
MQ135 Gas Sensor for Arduino/Raspberry Pi
MQ135 Gas Sensor for Arduino/Raspberry Pi - Image 2

The MQ135 Gas Sensor for Arduino/Raspberry Pi is a reliable air quality detection module that senses ammonia, sulfide, benzene, smoke, CO2, and other harmful gases.

MQ135 Gas Sensor for Arduino/Raspberry Pi

SKU 2003 Category Sensors & Modules

₹109.00 (Excl GST)

excl. GST*

Bulk deal
Quantity Discount Discounted price
10 - 29 2.5% ₹106.28
30 - 69 5% ₹103.55
70 - 100 7.5% ₹100.83

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MQ135 Gas Sensor for Arduino/Raspberry Pi

The MQ135 Gas Sensor for Arduino/Raspberry Pi is a reliable air quality detection module that senses ammonia, sulfide, benzene, smoke, CO2, and other harmful gases. It provides both analog and digital outputs for comprehensive air quality monitoring.


Key Features

  • Broad gas detection for ammonia, sulfide, benzene, smoke, CO2
  • High sensitivity with fast response time
  • Dual output – analog and digital for flexible interfacing
  • Adjustable threshold via onboard potentiometer
  • Long-term stability with minimal calibration drift
  • 5V operation compatible with all major microcontrollers
  • Compact design for easy integration

Technical Specifications

Parameter Specification
Model MQ-135
Operating Voltage 5V DC
Output Type Analog + Digital
Detectable Gases NH3, NOx, Alcohol, Benzene, Smoke, CO2
Detection Range 10-1000 ppm
Preheat Time 20 seconds (first use: 24-48 hours)
Operating Temp -10°C to +50°C
Power Consumption < 800mW

Applications

  • Indoor air quality monitors and smart ventilation
  • Greenhouse gas monitoring systems
  • Environmental research and pollution tracking
  • Smart home air purifier triggers
  • Industrial safety and emission monitoring
  • Urban air quality sensor networks

Important Notes

  • Requires 24-48 hours initial burn-in for accurate readings
  • Cross-sensitive to multiple gases – use for qualitative trends
  • Calibrate in known clean air before deployment
  • Temperature and humidity affect readings
  • Not certified for safety-critical applications

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