What is the range of the combustible gas detector?
The detection range of combustible gas detectors is mostly specified 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. For example, when the concentration of combustible gas leakage is detected to be greater than 50% LEL, the combustible gas detector will send out high-frequency audible and visual alarm signals to improve on-site operators' control of combustible gases in the environment, thereby achieving safe and efficient production.
The combustible gas detector can detect many combustible gases, such as natural gas, liquefied petroleum gas, coal 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, paints, thinners , coolant, dry cleaning fluid, methyl acetate, etc.).
What is LEL?
LEL refers to the lower explosion limit of a gas. When flammable gas, flammable liquid vapor (or combustible dust) is mixed with air and reaches a certain concentration, an explosion will occur when encountering a fire source. This concentration range in which an explosion can occur is called the explosion limit . The lower explosion limit of each gas is different.
For example, the explosion limit of hydrogen is: lower limit 4.0%, upper limit 74.2%. It will burn and explode when encountering air and open flame. 4.0% is the minimum volume fraction for hydrogen to explode when exposed to an open flame. If it is less than this bottom line, it will not burn or explode when exposed to an open flame. 74.2% is the upper limit (or upper limit) of the maximum volume fraction. When the volume fraction is higher than this upper limit, it can burn safely when exposed to air and open flames, and will not explode. In short, if the volume fraction is below or below the explosion limit, it will not explode when exposed to open flames.
Catalytic combustion gas detectors are used to monitor changes in combustible gases 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 respond sensitively to a wide variety of flammable gases. This technology has universal applicability to flammable gases.
Combustible gas detectors are gas detectors installed and used in industrial and civil buildings that respond to single or multiple combustible gas concentrations. The most commonly used combustible gas detectors are catalytic combustible gas detectors and semiconductor combustible gas detectors.
Semiconductor combustible gas detectors are mainly used in restaurants, hotels, home studios and other places that use gas, natural gas, and liquefied gas. Industrial places that emit combustible gases and combustible steam mainly use catalytic combustible gas detectors.
The above is the introduction provided by the editor of Shenzhen Liye on "What is the measuring range of combustible gas detectors". I hope it will be helpful for you to understand the combustible gas detectors! Regular cleaning and maintenance of combustible gas detectors is an important task to prevent combustible gas detectors from malfunctioning.
