Product Introduction
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MQ-2 Smoke Sensor Product Description
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The gas sensing material used in the MQ-2 smoke sensor is tin dioxide (SnO2) with low conductivity in clean air. When combustible gases are present in the environment, the sensor's conductivity increases with the concentration of combustible gases in the air. A simple circuit can convert the change in conductivity into an output signal corresponding to the gas concentration.
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The MQ-2 gas sensor has high sensitivity to liquefied petroleum gas, propane, and hydrogen, and is also ideal for detecting natural gas and other combustible vapors. This sensor can detect a variety of combustible gases and is a low-cost sensor suitable for multiple applications.
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MQ-2 Smoke Sensor Features
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* Good sensitivity to combustible gases over a wide concentration range
* High sensitivity to liquefied petroleum gas, propane, and hydrogen
* Long life, low cost
* Simple drive circuit required
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MQ-2 Smoke Sensor Main Applications
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* Household gas leak alarms
* Industrial combustible gas alarms
* Portable gas detectors
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MQ-2 Smoke Sensor Technical Specifications
| Model | MQ-2 | ||
| Product Type | Semiconductor gas sensing element | ||
| Standard Package | Bakelite (black bakelite) | ||
| Detection Gas | Combustible gases, smoke | ||
| Detection Concentration | 300-10000ppm (combustible gases) | ||
| Standard Circuit Conditions | Loop Voltage | Vc | ≤24V DC |
| Heater Voltage | VH | 5.0V±0.2V ACorDC | |
| Load Resistance | RL | Adjustable | |
| Gas Sensing Element Characteristics under Standard Test Conditions | Heater Resistance | RH | 31Ω±3Ω (room temperature) |
| Heater Power Consumption | PH | ≤900mW | |
| Surface Resistance of Sensing Body | Rs | 2KΩ-20KΩ(in 2000ppm C3H8 ) | |
| Sensitivity | S | Rs(in air)/Rs(1000ppm isobutane)≥5 | |
| Concentration Slope | α | ≤0.6(R3000ppm/R1000ppm C3H8) | |
| Standard Test Conditions | Temperature, Humidity | 20℃±2℃；65%±5%RH | |
| Standard Test Circuit | Vc:5.0V±0.1V； VH: 5.0V±0.1V | ||
| Preheat Time | No less than 48 hours | ||
