What is the numerical standard for a four in one gas detector?
I believe everyone knows that the four in one gas detector, also known as a composite gas detector, can mainly be used for routine detection of four types of gases: combustible gas EX, carbon monoxide CO, hydrogen sulfide H2S, and oxygen O2. However, when detecting these gases, the four in one gas detector also has relevant data standard requirements. So what is the numerical standard for a four in one gas detector?
Regarding the values of different concentration ranges of combustible gas methane:
1. Methane (CH4): Gas detector alarms when it exceeds 1.00%;
2. When the methane (CH4) value on the detector is below 1.00%, it is considered normal;
3. When the methane (CH4) value on the detector exceeds 5%, there is a risk of explosion when encountering bright light. Prohibit electric welding;
4. If the methane (CH4) value on the detector exceeds 25%, it can cause headaches, dizziness, fatigue, lack of concentration, and accelerated breathing and heartbeat. Go outside for ventilation every 30 minutes or so.
Regarding the values of different concentration ranges of carbon monoxide:
Carbon monoxide (CO): Gas detector alarms when it exceeds 24ppm;
When the carbon monoxide (CO) on the detector exceeds 50pm, it is the maximum amount allowed for adults to be exposed to it;
When the carbon monoxide (CO) on the detector exceeds 200ppm, after 2-3 hours, there is a slight headache. Dizziness and sadness, go outside for ventilation every 30 minutes or so;
When the carbon monoxide (CO) on the detector exceeds 400ppm, immediately leave the site and report to the relevant responsible person.
Regarding the values of different concentration ranges of hydrogen sulfide:
Hydrogen sulfide (H2S): Gas detector alarms when it exceeds 10ppm;
When hydrogen sulfide (H2S) is 50ppm – 100pa on the detector, there is a pungent odor. Go outside for ventilation every 30 minutes or so;
When hydrogen sulfide (H2S) reaches 100ppm – 200pm on the detector, the sense of smell becomes numb. Immediately leave the scene and report to the relevant responsible person;
Poisoning occurs within one hour when hydrogen sulfide (H2S) exceeds 200pm on the detector. Immediately leave the site and report to the relevant responsible person.
Regarding the values of oxygen in different concentration ranges:
Oxygen (02): Gas detector alarms when it is below 18.0%;
The gas (O2) value on the detector is 20.9%, which is the normal oxygen content in the air;
When the oxygen (O2) value on the detector is lower than 15%, people will experience shortness of breath, headaches, dizziness, and fatigue and weakness throughout the body. If the action is slow, immediately leave the scene and report to the relevant responsible person.
