For high sensitivity and selectivity in air monitoring, the 48C Series utilizes Gas Filter Correlation to measure high concentrations of carbon monoxide. Combining proven detection technology and experience in the field, this series can detect CO levels from 0 to 20,000 ppm.
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Product Detail
For High Sensitivity Air Monitoring
The Model 48CTL Gas Filter Correlation (GFC) CO Analyzer measures low CO concentrations. It combines proven detection technology, easy to use menu-driven software, and advanced diagnostics to offer unsurpassed flexibility and reliability.
Thermo Environmental Instruments design engineers introduced a user interface which easily guides one through operation of the Model 48CTL. This is accomplished via a 4 line by 20 character Vacuum Fluorescent Display and simple layout of easy-to-use function keys. The end result is a combination of self explanatory display messages and intuitive function entries.
The Model 48CTL is based on the principle that carbon monoxide (CO) absorbs infrared radiation at a wavelength of 4.6 micron. Because infrared absorption is a nonlinear measurement technique, it is necessary for the instrument electronics to transform the basic analyzer signal into a linear output. The Model 48CTL uses an exact calibration curve to accurately linearize the instrument output over any range up to a concentration of 1,000 ppm.
The sample is drawn into the analyzer through the SAMPLE bulkhead. The sample flows through the optical bench. Radiation from an infrared source is chopped and then passed through a gas filter alternating between CO and N2 . The radiation the passes through a narrow bandpass interference and enters the optical bench where absorption by the sample gas occurs. The infrared radiation then exits the optical bench and falls on an infrared detector.
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