Suitable Uses:

The MiCS-5524 gas sensor can detect a variety of gases, including but not limited to:

• Carbon Monoxide Detection (CO)
• Ethanol (Alcohol)
• Hydrogen (H2)
• Ammonia (NH3)
• Methane (CH4)
• Propane (C3H8)
• Isobutane (C4H10)
• Natural Gas Leak Detection
• Monitoring Air Quality
• Early Fire Detection
• Breathalyzer (alcohol detection)
• Volatile Organic Compounds (VOCs)
• Only 4 Pins: 5V: Power, GND: Ground
• Ao: Analog Output (0V to 5V: as the amount of detected gases increases, voltage increases) 
• En: Output Enable (to turn off the sensor for power consumption, send a HIGH 5V signal)

Detection ranges:

• Carbon Monoxide CO: approx 1 to 1000 ppm
• Ammonia: approx 1 to 500 ppm
• Ethanol: approx 10 to 500 ppm
• H2: approx 1 – 1000 ppm
• Methane: approx 1000++ ppm
• Propane: approx 1000++ ppm
• Iso-Butane: approx 1000++ ppm