Product Introduction
- 1.MQ-4 Natural Gas Sensor Product Description
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The gas-sensitive material used in the MQ-4 natural gas sensor is tin dioxide (SnO2) with low conductivity in clean air. When combustible gas is present in the environment, the sensor's conductivity increases with the concentration of the combustible gas. A simple circuit can convert the change in conductivity into an output signal corresponding to the gas concentration.
The MQ-4 natural gas detection sensor has high sensitivity to methane and good sensitivity to propane and butane. This sensor can detect a variety of combustible gases, especially natural gas, and is a low-cost sensor suitable for multiple applications.
- 2.MQ-4 Natural Gas Sensor Features
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Good sensitivity to combustible gases over a wide concentration range
High sensitivity to methane
Long life, low cost
Simple drive circuit required
- 3. MQ-4 Natural Gas Sensor Applications
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Household gas leak alarms
Industrial combustible gas alarms
Portable gas detectors
- 4.MQ-4 Natural Gas Sensor Technical Specifications
| Product Model |
MQ-4 |
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| Product Type |
Semiconductor gas sensor element |
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| Standard Package |
Bakelite (black bakelite) |
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| Detection Gas |
Natural gas, methane |
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| Detection Concentration |
300-10000ppm (methane, natural gas) |
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| Standard Circuit Conditions |
Loop Voltage |
Vc |
≤24V DC |
| Heater Voltage |
VH |
5.0V±0.2V ACorDC |
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| Load Resistance |
RL |
Adjustable |
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| Gas Sensor Characteristics under Standard Test Conditions |
Heater Resistance |
RH |
31Ω±3Ω (room temperature) |
| Heater Power Consumption |
PH |
≤900mW |
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| Surface Resistance of Sensitive Body |
Rs |
2KΩ-20KΩ(in 5000ppm CH4 ) |
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| Sensitivity |
S |
Rs(in air)/Rs(5000ppm methane)≥5 |
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| Concentration Slope |
α |
≤0.6(R5000ppm/R3000ppm CH4) |
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| Standard Test Conditions |
Temperature, Humidity |
20℃±2℃；65%±5%RH |
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| Standard Test Circuit |
Vc:5.0V±0.1V； VH: 5.0V±0.1V |
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| Preheat Time |
No less than 48 hours |
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