What is a gas leak?
Gas leakage, including methane gas, which is mainly called natural gas, and gas coolers, refrigerators and other gases used in industry, and… according to the definition, is the unintentional and involuntary outflow of gas for various reasons and suddenly.
There is always the possibility of gas leaks in facilities, pipelines, gas transmission and distribution networks and in homes. will be.
Gas leak detector
A gas detector is a device that detects the presence of gas in a specific area and is often used as a safety system against unwanted leaks. Gas leak detection equipment or other leak detectors have the ability to communicate with industrial control systems. Also, leak detection devices to control the safety of employees and the environment and equipment are equipped with alarms to the operator. The main use of gas leaks is to detect flammable, flammable and toxic gases and even cases of oxygen depletion in the environment.
Gas leak detection systems
Detection of hazardous, deadly and incendiary gases is very important, the possibility of exposure to toxic gases can be in operations such as painting, fumigation, fuel filling, construction, excavation of contaminated soil, landfill operations, entering the space and Etc. occur. Today, gas leak detectors can detect the presence of gas in a certain area, mainly gas leak detectors by sensitive and fast sensors detect the type of gas and the amount of ambient gas and the existence of alarms or other methods This component is notified to the operator.
Today, a variety of leak detection systems have been introduced to the market, each of which tries to find the leak phenomenon accurately and quickly using a special technique and sensor. These sensors mainly include combustible gas sensors, photonization detectors, infrared sensors, ultrasonic sensors, electrochemical gas sensors and semiconductor sensors and.. Newer models of gas leak detection systems work with thermovision function and thermographic cameras.
Gas detectors and gas analyzers
A gas analyzer is a device that detects the presence of combustion gases at concentrations below the explosion range and alerts the operator to this value. This device has a catalytic filament made of platinum in its internal structure, which provides the possibility of combining gas and oxygen in concentrations below the explosion range, and the temperature of the filament changes with the concentration of gas, and this temperature change in the form of resistance change in An electronic circuit and subsequent final current changes are transmitted to the user in the form of analog or digital signals on the screen and audio signals.
Gas detectors are divided into two main groups in terms of application:
- Manual and portable gas detector (portable gas analyzer): These gas detectors are designed as portable and are placed or moved by their operator in the direction of the gas pipe or the desired locations in case of any leak detection due to sensitivity. The device announces the presence of gas and its amount by warning signs.
- Fixed gas detector (fixed gas analyzer): These samples of gas detectors are permanently installed on site to detect gas. The main use of these gas detectors in industrial environments, halls or workshops is the production of hazardous products.
Application of detector sensor in natural gas leak detector
Example of advanced application of sensors in gas leak detection, sensors Gas leak detector Portable and portable natural, with remote leak detection capability.
The purpose of this idea and to follow the construction of this device is to increase the technological capability of lightweight and portable detectors that are able to detect natural gas leaks from other hydrocarbons. These devices are able to perform leak detection from a distance and show the relative volume of leaked gas in numbers.
The device operates in such a way as to enable the detector to operate in contaminated environments without posing a risk to the leak detection technician.
The mechanism of operation of the device is such that the infrared laser beam (Infrared laser beam) is directed towards the contaminated environment or environment suspected of contamination such as road surface or building wall. ) And after processing, announces the amount of methane gas in the path of the laser light.
Another advantage of this Gas leak detector Natural compared to other leak detectors, power Natural gas leak detection 100 feet from the leak site Gas leak detector Natural is known from afar. This system is also sensitive to minor leaks of several ppm and is able to quickly detect natural gas leaks at 50 liters per hour.
The type of function of the sensors used in gas leak detectors is different in detecting different gases. The sensors used in leak detectors use different methods of electrochemical, infrared, thermal ionization, optical ionization, etc. Each of these Relevant methods and sensors have strengths and weaknesses compared to others. For example, the infrared sensor method uses the property that most gases absorb infrared radiation at a specific wavelength or band. This property is one of the properties of the chemical structure of molecules in gases that absorb all hydrocarbon gases of infrared rays and by measuring the percentage of gas absorption in the infrared rays, the type of gas can be obtained.
Application of gas leak detector
Gas leak detectors in general in industrial plants, refineries, pharmaceuticals, foam installations, paper mills, aircraft equipment and shipbuilding, hazardous materials production operations, water treatment plants, vehicles, air conditioners in the environment Indoor and air quality testing, space industry and spacecraft as well as residential homes are used.
In particular, the ultrasonic type of gas leak detectors is used to check the sealing of a product and its non-leakage. Other types of leak detectors, depending on the type of sensor used, are used to detect city gas, or refrigerant gases to detect leaks in refrigerators or refrigeration systems. Gas analyzers are mainly used in flue outlets, as well as in all industrial places that have a combustion furnace and need to determine the fuel efficiency and control of gaseous pollutants, and air quality control devices in laboratories, flower and plant breeding centers. And fungi are used to test for environmental contaminants.
Note that usually Gas leaks It is resistant to various weather conditions, but it should be noted that in principle, leak detection in cases of strong winds and storms, rain and snowfall, as well as on the surface covered with water, snow and ice is useless and has an incorrect result.
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