Specifications

1. MQ-2:
   • Target Gases: Methane, Butane, LPG, Smoke
   • Concentration Range: 300-10,000 ppm
2. MQ-3:
   • Target Gases: Alcohol, Benzine, CH4, Hexane, LPG, CO
   • Concentration Range: 10-1000 ppm
3. MQ-4:
   • Target Gases: Methane, CNG
   • Concentration Range: 200-10,000 ppm
4. MQ-5:
   • Target Gases: LPG, Natural Gas, Town Gas
   • Concentration Range: 200-10,000 ppm
5. MQ-6:
   • Target Gases: LPG, Butane, Iso-Butane, Propane
   • Concentration Range: 200-10,000 ppm
6. MQ-7:
   • Target Gases: Carbon Monoxide (CO)
   • Concentration Range: 20-2000 ppm
7. MQ-8:
   • Target Gases: Hydrogen (H2)
   • Concentration Range: 100-10,000 ppm
8. MQ-9:
   • Target Gases: Carbon Monoxide (CO), Methane, LPG
   • Concentration Range: CO: 10-500 ppm, CH4: 200-10,000 ppm, LPG: 200-10,000 ppm
9. MQ-135:
   • Target Gases: Air Quality, NH3, NOx, Alcohol, Benzene, Smoke, CO2
   • Concentration Range: 10-1000 ppm

Common Specifications

• Power Supply Voltage: 5V DC
• Heating Voltage (VH): 5V ± 0.2V AC or DC
• Load Resistance (RL): Adjustable via onboard potentiometer, typically 10kΩ
• Sensor Resistance (RS): Varies with gas concentration, typically 2kΩ to 20kΩ
• Preheat Time: 24 hours (for optimal performance)
• Analog Output: Voltage proportional to the gas concentration

Features

• Wide Range of Gas Detection: Covers a variety of gases, making it suitable for multiple applications.
• Analog Output: Easy to interface with microcontrollers and analog-to-digital converters.
• Adjustable Sensitivity: The onboard potentiometer allows for adjusting the sensitivity and load resistance.
• Fast Response and Recovery Time: Quickly respond to changes in gas concentration.
• Low Cost: Affordable solution for comprehensive gas detection.
• Durable: Robust design for reliable operation in various environments.