The application of non-ocular methane laser gas detector

Introduction: The greatest difference in the hazard characteristics of limited space operations and other operations is that there are more gas hazards, and this hazard cannot be perceived by human senses. In order to effectively take measures to avoid such hazards, it is very necessary to rely on gas detection instruments that are sensitive, correct, and rapid to respond to hazardous gases. How to select correct and effective gas detectors has become an important issue in limited space operations.

Methane is widely distributed in nature. Methane is the simplest organic matter and is the main component of natural gas, biogas, and pit gas, commonly known as gas. It is also the hydrocarbon with the smallest amount of carbon (the largest amount of hydrogen), and it is also the main component of natural gas, biogas, oilfield gas and coal mine tunnel gas. It can be used as a fuel and raw materials for the production of hydrogen, carbon black, carbon monoxide, acetylene, hydrocyanic acid and formaldehyde. Methane gas hazards may occur in industries such as agriculture, chemicals, industry, manufacturing, mining, hazardous materials, oil, gas, paper and pulp, and warehouses. Not only is it harmful to the health of the operator, but once the leak occurs, it will affect the surrounding environment. Has a great impact.

At present, gas detection machines for methane mainly include non-dispersive infrared helium-based online gas detectors and catalytic combustion methane detectors. These instruments cannot quantitatively correct the cross-interference of background gases such as moisture, and at the same time prevent contamination of the optical windows in the analytical instrument by dust in the process gas. Therefore, before the gas analysis, sampling probes must be used to sample the process gases that need to be analyzed. The sample gas is removed after the complex pretreatment system removes dust and moisture and then sent to the gas analysis equipment for gas analysis. These gas analysis systems often have many Defects, such as: gas sampling and pretreatment system can not meet the analytical instrument requirements, resulting in easy instrument damage, short maintenance and repair cycles; sampling and pretreatment system maintenance workload, expensive; system response time is delayed, can not be completely Meet the requirements of real-time control of industrial processes.

Whether it is an infrared methane detector or catalytic combustion methane detector has some inherent defects, has become a bottleneck for enterprises to achieve process control automation, but also restricts the development and application of gas detectors. The laser methane detector (ES10B11-CH4/T) developed by Shenzhen Eyeless Technology Co., Ltd. has the advantages of no sample pretreatment system, on-site installation measurement, high measurement accuracy, and fast response, which solves the above problems. .

The eye-less laser methane detector (ES10B11-CH4/T) has its own intellectual property rights and is a new type of gas sensor developed based on the principle of tunable semiconductor laser absorption spectroscopy (TDLAS). TDLAS technology is essentially a spectral absorption technology that obtains gas concentrations by analyzing the selective absorption of laser light by gases. It differs from the traditional infrared spectrum absorption technology in that the semiconductor laser spectrum width is smaller than the gas absorption spectrum line width. No eye laser

The methane detector is a kind of in-situ source, in which the molecular absorption wavelength of gas has nothing to do with the external temperature and pressure, and the wavelength absorption characteristics of different gas molecules do not interfere with each other, and still realizes independence from the ambient temperature and humidity, without interference gas. Installed gas analyzer.

TDLAS technology has been the first choice for the accurate analysis of industrial process gases. It is the first time that this technology has been brought into the field of diffusion gas detection instruments for the first time. It has completely solved the zero drift, range drift, poisoning failure, and interference gas impact of traditional gas detection instruments. problem.

The no-eye laser gas detector is an intrinsically safe intelligent monitoring instrument with stable performance, high sensitivity, no mechanical moving parts, and good anti-seismic capability. On the other hand, the instrument still has nothing to do with the concentration data and optical power on the detection principle, so it is not subject to Dust and moisture disturbances. Compared with the traditional methane detector, the non-eye laser gas detector has no dielectric loss during the working process, and generally has a life of 5 years and no need to replace the sensor. Of course, it will not cause the sensor to be poisoned due to elements such as silicon and sulfur; the device is a detection device. The change of the physical quantity of gas does not require O2 participation, so it has strong operability; the device only responds to a single gas and is not affected by other interference gases; the range of detection gas can reach 0-100% vol; depending on the optical path, the sensitivity can reach 0.01 %VOL.

The development of the new non-eye-thinking laser methane detector analytical instrument not only provides a more innovative and effective solution to methane gas hazard detection, but also plays an important role in enriching the product range in the field of exploring the environmental protection market without eyes. A step-by-step improvement of the vision-free enterprise will provide customers with a systematic and complete one-stop gas detection solution to the corporate target.

Source: Shenzhen Eyeless Technology Co., Ltd.