1. About the values of different concentration ranges of combustible gas methane:
1. Methane (CH4): the gas detector alarms when it exceeds 1.00%;
2. When the methane (CH4) value on the detector is lower than 1.00%, it is normal;
3. When the value of methane (CH4) on the detector exceeds 5%, there is a danger of explosion in case of bright light. Electric welding is prohibited;
4. The methane (CH4) value on the detector exceeds 25%, which can cause headache, dizziness, fatigue, inability to concentrate, rapid breathing and heartbeat. Go outside every 30 minutes or so to breathe.
2. About the value of carbon monoxide in different concentration ranges:
Carbon monoxide (CO): the gas detector alarms when it exceeds 24ppm;
When the carbon monoxide (CO) of the detector exceeds 50pm, it is the maximum content allowed by adults in it;
When the carbon monoxide (CO) of the detector exceeds 200ppm, (2-3) hours later, there is a slight headache. Dizziness and sympathy, ventilate outside every 30 minutes or so;
When the carbon monoxide (CO) of the detector exceeds 400ppm, immediately leave the scene and report to the responsible person.
3. About the value of hydrogen sulfide in different concentration ranges:
Hydrogen sulfide (H2S): the gas detector alarms when it exceeds 10ppm;
When the hydrogen sulfide (H2S) on the detector is 50ppm-100pa, there is a thorny taste. ventilate outside every 30 minutes or so;
When the hydrogen sulfide (H2S) on the detector is 100ppm-200pm, the sense of smell is paralyzed, immediately leave the scene and report to the relevant responsible person;
When the hydrogen sulfide (H2S) on the detector exceeds 200pm, it will be poisoned within one hour. Immediately leave the scene and report to the responsible person.
4. Values for different concentration ranges of oxygen:
Oxygen (02): The gas detector will alarm when it is lower than 18.0%;
The gas (O2) value on the detector is 20.9%, which is the normal content of oxygen in the air;
When the oxygen (O2) value on the detector is lower than 15%, people will experience shortness of breath, headache, dizziness, and fatigue. If you are sluggish, leave the scene immediately and report to the responsible person.
