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PRZOOM - /newswire/ -
Biassono, Monza and Brianza, Italy, 2016/11/09 - NIRA is designing new product lines of LEL monitoring systems for all possible industrial applications - NiraInstruments.com.
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NIRA is designing new product lines of LEL monitoring systems for all possible industrial applications, serving both top safety and applicability in the most extreme situations NIRA's systems promise to allow for constant solvent level monitoring both where maximum precision and speed are required and where explosion hazards are greatest.
Industrial plants, and chemical plants especially, are daily exposed to the danger of sudden fires and even explosions: the greatest cause for such hazard is the high content of combustible gases in their atmospheres, which combines with the high temperatures needed for several processes to generate a high-risk situation. LEL Monitoring systems like those manufactured by NIRA Instruments are designed to constantly verify atmospherical composition at key spots and ensure that combustible and explosive gases never accumulate in quantities over a specified safety level (the LEL in LEL Monitoring System stands for Lower Explosion Level, the threshold below which fire and explosion hazards are negligible), so as to avert all possible fire and explosion risks. NIRA's efforts move along two different tracks, leading to two main product lines for this kind of device:
Infrared LEL monitoring system
An Infrared LEL monitoring system is particularly well-suited to all those applications and situations where atmosphere monitoring must be carried out in the immediate proximity of very high-risk areas, since its construction makes it EC and ATEX certified, and thus insures that it is safe even in such extreme applications. Detection of combustible gas levels in an infrared LEL monitoring system is based on the emission and detection of beams of infrared light, which are made to pass through a forced flow of the atmosphere to be analyzed. Since each combustible gas
has a specific, recognizable absorption of light in the infrared spectrum, when the receiver picks up the light beam the system is capable of analyzing the loss of intensity and elaborating a list of all the gases present in the atmosphere, verifying that none of them is over a calibrated safety threshold.
Flame ionization-based LEL monitoring system
The other main type of device used in these applications is the flame ionization-based LEL monitoring system, which makes use of a different principle to obtain similar results. While not safe to use in high explosion-risk areas, this kind of monitoring system sports a far higher level of precision and speed, and is thus often used when extremely detailed analyses are required, such as is the case n the presence of particularly complex gas mixtures. In a flame ionization-based LEL monitoring system, the sample gas mixture is heated by a small hydrogen-air flame: this causes its ionization, and a tiny metallic lattice built around the flame captures all generated ions, inducing a current. The intesity of which is directly proportional to combustible gas present for example, due to solvent residues.
NIRA Instruments' (nirainstruments.com | nirainstruments.it) LEL monitoring systems are among the best known and most used in the printing industry, striking an ideal balance between efficiency and investments.
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