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using the product:
1. In a clean air environment,press the power key to turn on.
2. The detector will start preheating the sensor,and the analog bar will be displayed circularly.after waiting for about 30 seconds,the detector will beep "di"and preheat is completed.
3. After preheating the detector,take the detector to the detection environment.
4. Move the sensor head closer to the detection point.
5. When the detector detects combustible gas,the number of simulation bars will increase with the increase of gas concentration.the beeping sound will also become fasrer as the gas concentration increases.
6. Press the power key and hold it for more than 1 second,then the buzzer will beep for a short time to turn off.