MP135 Air Pollution Gas Sensor DIP-4

The MP135 is a metal oxide semiconductor (MOS) gas sensor designed for detecting changes in air composition caused by reducing gases such as hydrogen (H₂), carbon monoxide (CO), and alcohol vapors (VOC-like gases).

It provides an analog resistance-based output that varies depending on gas concentration in the environment. The sensor is commonly used for general air-quality trend monitoring and detection of gas leaks or pollution changes.

Due to its sensing principle, the MP135 has non-selective behavior, meaning it cannot distinguish between specific gases and is affected by humidity and temperature variations. It is suitable for indicative air-quality sensing, but not for calibrated or regulatory-grade measurements.

Features:

1. Sensitive to hydrogen (H₂), carbon monoxide (CO), and alcohol vapors (VOC-like gases)
2. Non-selective MOS gas sensing (cannot distinguish individual gases)
3. Analog resistance-based output suitable for microcontroller ADC input
4. Response time in seconds range (depends on conditions)
5. Performance affected by temperature and humidity
6. Requires calibration for meaningful readings
7. DIP-4 package suitable for PCB and prototyping applications

Specifications:

1. Item Type: MP135 MOS air-quality gas sensor
2. Package Type: DIP-4
3. Detection Gases:
   1. Hydrogen (H₂)
   2. Carbon monoxide (CO)
   3. Alcohol vapors (VOC-like reducing gases)
4. Output Type: Analog voltage (resistance-based divider output)
5. Operating Voltage: 5V DC heater supply
6. Heater Resistance: ~31Ω ± 3Ω
7. Heater Power Consumption: ≤900 mW
8. Load Resistance: External adjustable resistor required
9. Heater Power Consumption: ≤900 mW
10. Load Resistance: Adjustable
11. Response Time: Fast response & recovery
12. Weight : 1g

Package Includes:

1 x MP135 Air Pollution Gas Sensor DIP-4