What is the measuring range of combustible gas detector?
The detection range of combustible gas detector is mostly within 0-100%LEL. If the leakage concentration of combustible gas is greater than 25%LEL and less than 50%LEL, the combustible gas detector will give a low alarm. For example, when the leakage concentration of combustible gas is more than 50%LEL, the combustible gas detector will send out high-frequency acousto-optic alarm and early warning signals to improve the control of combustible gas in the environment by field operators, so as to achieve safe and efficient production.
What is the measuring range of combustible gas detector?
The combustible gas detector can detect many combustible gases, such as natural gas, liquefied 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 vinyl chloride.
What is LEL?
LEL refers to the lower explosion limit of gas. When combustible gas and combustible liquid vapor (or combustible dust) are mixed with air and reach a certain concentration, it will explode when it meets a fire source. This concentration range that can explode is called explosion limit. The lower explosive 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%. When it meets air and open flame, it will burn and explode. 4.0% is the lowest volume fraction of hydrogen when it meets an open flame, which is less than this bottom line. When it meets an open flame, it will not burn 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 be safely burned when it meets air and open flames, and there will be no explosion. In short, when the volume fraction is below or below the explosion limit, it will not explode when it meets an open flame.
Catalytic combustion gas detector is used to monitor the change of combustible gas in the surrounding air from 0 to 0~100%LEL. The sensor adopts catalytic combustion technology, and the sensor can be replaced in the field. The catalytic combustion sensor has a keen response to a wide variety of flammable gases. This technology has universal applicability to combustible gases.
Combustible gas detector is a gas detector installed and used in industrial and civil buildings, which responds to the concentration of single or multiple combustible gases. 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, family workshops and other places where gas, natural gas and liquefied gas are used, and catalytic combustible gas detectors are mainly used in industrial places where combustible gas and combustible steam are emitted.
