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Tiger
Optics Offers LaserTrace for Early Warning Warrington, PA (December 2004) Tiger Optics is pleased to introduce the LaserTrace to the Semiconductor market to monitor purifier breakthrough. With its split architecture design, allowing simultaneous monitoring of up to four gases, the LaserTrace™ offers the first modular, multi-point, multi-species, multi-gas analyzer based on proven technology, known as Cavity Ring-Down Spectroscopy (CRDS). It provides a fast, accurate, calibration- free, and easy-to-use means to detect molecular contaminants down to parts-per-trillion levels. A continuous supply of clean, dry, purified instrument “zero air” is integral to the vehicle emissions monitoring process. Prior to use for calibration or dilution purposes, instrument air must be purified to remove any contaminants. If the zero air contains impurities, such as CH4, CO, CO2, NOx, and propane (C3H8), it invalidates the calibration procedure and provides erroneous test results during the dilution process. Purifiers that contain a copper oxide catalyst are typically used to remove these impurities. Methane is by far the most difficult to remove, it is typically assumed that the purification process is functioning properly if the methane levels are lower than 50 ppb. Depending on species, the detection range of the LaserTrace extends from 100 ppt up to 1000 ppm. This is a valuable verification tool for the zero air sources used to calibrate FID, GC, NDIR, and chemiluminescent analyzers used for vehicle emission monitoring. The LaserTrace can be used as a real-time monitoring device that allows closed-loop continuous feedback for calibration and emissions equipment. Doing so will allow for adjustment to the “zero air” baseline and provide more accurate long-term results. About
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