Application of gas monitor
Detection of toxic gas emissions such as carbon monoxide (CO), carbon dioxide (CO 2 ) and methane (CH 4 ) can be achieved through a variety of applications and processes and is critical to ensuring the safety of all workers. Aside from safety concerns, these types of gas detectors are also used to improve the efficiency of certain chemical industrial processes that produce syngas, methanol, acetic acid, and other chemicals. While these industries can use natural gas to generate electricity, the release of greenhouse gases such as methane can lead to catastrophic events, including explosions, serious injuries or even death to nearby workers. It is therefore critical to closely monitor for potential releases of these types of hazardous gases during extraction and transport in facilities utilizing these power generation gases. We can use gas monitor to monitor.
Catalytic gas sensors are able to directly detect methane concentration by measuring the change in electrical resistance due to the heat generated after the reaction between methane and oxygen. In the process, the catalytic sensor initiates a reaction between methane and oxygen. Since catalytic sensors require oxygen to function, they are vulnerable to potential human poisoning, sintering and contamination. Although catalytic sensors are rugged and often inexpensive tools, they often require periodic calibration and replacement parts.
These gas monitors detect gas concentrations by measuring the current generated by the oxidation or reduction of methane at electrodes. Electrochemical sensors also require frequent replacement due to contamination and corrosion caused by contact between the electrodes and the environment.
Infrared (NDIR) sensor
Infrared (NDIR) sensors detect and measure the concentration of gases by using an infrared beam. A non-dispersive infrared (NDIR) sensor consists of an infrared source, a sample chamber, a filter and an infrared detector, and a reference gas present in another chamber. When exposed to methane gas, specific wavelengths of infrared light passing through the sample chamber are absorbed by the methane. The decay signal is then measured and quantified by a detector to accurately determine the methane concentration.
Infrared sensors are less susceptible to chemical contamination or poisoning than the aforementioned devices due to their non-contact nature. Therefore, infrared sensors are a rugged choice. Additionally, the infrared sensor is equipped with a fail-safe mechanism that alerts the user when the sensor malfunctions or is obscured. The non-polluting nature, robustness, accuracy and ability of infrared sensors to detect multiple gases make these tools a powerful gas detection technology. IR sensors have been used as the method of choice for gas detection for methane and various other gases of industrial and environmental relevance.
Advances in Infrared Gas Sensors
While the previous generation of infrared gas monitors was adversely affected by temperature and pressure, the new generation of infrared sensors compensates for the effects of temperature and pressure, making them more reliable and durable. For example, Gascard NG from Edinburgh gas monitor is a leading supplier of high quality gas sensing solutions, providing users with accurate and reliable CO, CO2 and CH4 concentration measurements. Because Gascard NG offers a wide range of temperature and pressure corrections, the sensor can be used in a variety of applications including research laboratories, industrial, agricultural and environmental applications such as pollution monitoring.