The SLP22A catalytic combustion combustible gas sensor consists of a paired detection element and a compensation element, with the two components being a platinum wire coil wrapped in catalyst and inert material. The combustible gas will undergo catalytic combustion reaction on the catalyst of the working element, causing an increase in the resistance of the detection element, thereby changing the output voltage of the bridge circuit. This change is linearly positively correlated with the concentration of combustible gas; Combustible gases do not undergo catalytic combustion reactions on the compensation element, so there is no change in resistance. The compensation element mainly serves as a reference and environmental temperature and humidity compensation function.
| Item | Parameters |
| Model | SLP22A |
| Detection principle | Catalytic combustion |
| Detection gas | Combustible Gas |
| Working Voltage | 2.5V（±0.1V） |
| Working Current | 150mA（±10mA） |
| Detecting Range | 0-100%LEL |
| Sensitivity | 20-40mV / 1%CH4 |
| Zero voltage | ±30mV |
| Resolution | 1%LEL |
| Responding Time | T90≤15s |
| Recovering Time | T10≤30s |
| Working Temp/Hum. | -20 ~ +60℃ ＜95%RH |
| Storage Temp/Hum. | -20 ~ +60℃ ＜95%RH |
| Zero Drift | ≤±1%LEL /month |
| Sensitivity Drift | ≤±1.5%LEL month |
| Service Life | 3 years |
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