MQ135 Gas Sensor for Arduino/Raspberry PiSKU 2003

Sensors & Modules

MQ135 Gas Sensor for Arduino/Raspberry Pi

₹109

01 — About

What it does

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

Good to know

  • 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

02 — Datasheet

Specifications

08
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