Products
CH4 Gas Sensor
for portable gas detector
Application:
Gas leak alarm for homeProduct characteristics:
Long lifeDescription
MQ-K4B gas sensor uses tin dioxide (SnO2), a gas-sensitive material with low conductivity in clean air. When combustible gases are present in the sensor's environment, the sensor's conductivity increases with the concentration of the combustible gas in the air. A simple circuit can convert this change in conductivity into an output signal corresponding to the gas concentration.
MQ-K4B gas sensor has high sensitivity to methane and strong resistance to interference from alcohol and other interfering gases.
Specifications
| Media | CH4 |
| Sealing type | plastic sealing |
| Testing range | 300-10000ppm |
| Loop voltage | ≤24V DC |
| Heating voltage | Vh=5v±0.1 AC or DC |
| Load resistor | RL(adjustable) |
| Heating resistor | Rh=27Ω±3Ω(room temperature) |
| Heating power | ≤900mW |
| Sensitivity | Rs(in air)/Rs(in 5000ppm CH4)≥5 |
| Output voltage | Vs=2.5-4.0V(in 5000ppm CH4) |
| Concentration slope | ≤0.6(R5000ppm/R1000ppm CH4) |
| Temperature and humidity | 20℃±2℃, 55%±5%RH |
| Pre-heating time | >48h |
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