What is the measuring range of the gas detector
The detection range of combustible gas detectors is mostly within 0-100%LEL. If the detected combustible gas leakage concentration is greater than 25%LEL and less than 50%LEL, the combustible gas detector will issue a low alarm. If the detected combustible gas leakage concentration is greater than 50% LEL, the combustible gas detector will send out a high-frequency sound and light alarm and early warning signal to improve the on-site operators' control of combustible gas in the environment, so as to achieve safe and efficient production.
Shenzhen Liye: What is the range of the combustible gas detector
The combustible gas detector can detect many combustible gases, such as natural gas, liquefied petroleum gas, gas, ethane, acetylene, butane, n-butane, isobutane, pentane, hexane, halogenated hydrocarbons (chloromethane, methylene chloride, trichloroethane, vinyl chloride), alcohols (methanol, ethanol, propanol), ethers, ketones (butanone, acetone), hydrogen, toluene and other compounds (gasoline, industrial solvents, lacquers, thinners , coolant, dry cleaning fluid, methyl acetate, etc.).
What is LEL?
LEL refers to the lower explosion limit of gas. When combustible gas, combustible liquid vapor (or combustible dust) is mixed with air and reaches a certain concentration, it will explode when encountering a fire source. This range of concentration that can cause explosion is called the explosion limit. . The lower explosion limit of each gas is different.
For example, the explosion limit of hydrogen: the lower limit is 4.0%, and the upper limit is 74.2%. It will burn and explode when it encounters air or open flame. 4.0% is the minimum volume fraction of hydrogen that explodes when it encounters an open flame. If it is less than this bottom line, it will not burn when it encounters an open flame, and it will not explode. 74.2% is the highest limit (or upper limit) of the highest volume fraction. When the volume fraction is higher than this upper limit, it can burn safely and will not explode when it encounters air and open flame. In a word, the range where the volume fraction is lower or lower than the explosion limit will not explode when exposed to an open flame.
The catalytic combustion gas detector is used to monitor the change of combustible gas in the surrounding air from 0 to 100% LEL. The sensor uses catalytic combustion technology and the sensor can be replaced in the field. Catalytic combustion sensors are sensitive to a wide variety of combustible gases. This technique is generally applicable to flammable gases.
The combustible gas detector is a gas detector installed and used in industrial and civil buildings that responds to the concentration of a single or multiple combustible gases. There are two types of combustible gas detectors that are most used in daily life: catalytic combustible gas detectors and semiconductor combustible gas detectors.
Restaurants, guesthouses, home workshops and other places that use gas, natural gas, and liquefied petroleum gas mainly use semiconductor-type combustible gas detectors, and industrial places that emit combustible gas and combustible steam mainly use catalytic combustible gas detectors.
