MQ-2 Smoke Gas Sensor

Description: 

The MQ-2 Smoke Gas Sensor is a popular and low-cost sensor used for detecting a wide range of combustible gases and smoke. It utilizes a sensitive layer made of tin dioxide (SnO2), a metal oxide semiconductor material. When the target gas interacts with the surface of the sensing element, it causes a change in the sensor's electrical resistance. This change in resistance is then converted into an analog voltage output, which varies with the concentration of the detected gas. The MQ2 is capable of detecting gases like LPG, butane, propane, methane, hydrogen, alcohol, and carbon monoxide (CO), as well as smoke particles. Due to its broad detection range, it is commonly used in various safety and monitoring applications.

Features:

• High Sensitivity to a Variety of Gases

• Good Sensitivity to Smoke

• Fast Response and Recovery

• Stable and Long Lifespan

• Low Cost

• Simple Drive Circuit

Specifications:

Target Gases: LPG, Butane, Propane, Methane, Hydrogen, Alcohol, Carbon Monoxide, Smoke.

Detection Range: 100 ppm - 2000 ppm (Alcohol, CO); 200 ppm - 5000 ppm (LPG, Propane, Butane); 300 ppm - 5000 ppm (H2); 5000 ppm - 20000 ppm (Methane)

Operating Voltage: 5V ± 0.1V DC

Heater Voltage: 5V ± 0.1V AC/DC

Load Resistance: 20KΩ (adjustable)

Heater Resistance: 31Ω ± 3Ω

Heater Consumption: ≤ 900 mW

Response Time: ≤ 15 s

Recovery Time: ≤ 15 s

Preheat time: 48 hours

Operating Temperature: -10°C to 50°C

Operating Humidity: ≤ 95% RH

Standard Condition: Temperature: 20°C ± 2°C; Humidity: 65% ± 5% RH

Application:

Domestic Gas Leakage Detection

Industrial Flammable Gas Detection

Portable Gas Detectors

Smoke Detectors

Air Quality Monitoring

Safety Systems

Educational and Hobbyist Projects