Products
CH4 Gas Sensor
for portable gas detector
Application:
Gas leak alarm for home, combustible gas alarm for industry and portable gas detectorProduct characteristics:
Long life1. Performance
MQ-K4B is mainly used in gas leak alarm for home, combustible gas alarm for industry and portable gas detector. It is sensitive to CH4.
2. Appearance and dimension
3. Technical 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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