Cross Correlator
-
Product
In-Situ Cross- Stack Laser Analyzer
-
LS25 is an in-situ analyzer for non-contact measurement of the concentration of gases. The measuring principle of the LS25 is based on the principle of single line spectroscopy (Tunable diode laser absorption spectroscopy, TDLAS). A single cross-sensitivity-free absorption line of the gas to be measured is selected in the near infrared range. A single-mode diode laser operating at room temperature scans the respective absorption line. By using an opposite receiver, the absorption caused by the sample gas is measured and from this the concentration is calculated. An automatic correction for pressure and temperature changes is possible. In addition, the transmission is displayed respectively output as a signal for preventive maintenance.
-
Product
Gas Filter Correlation CO Analyzer
Model T300U
-
Teledyne Advanced Pollution Instrumentation
The Model T300U Trace-level CO analyzer has been developed specifically to address the challenges of low level monitoring as required, for example, in the US NCore network. Using IR absorption with a Gas Filter Correlation Wheel, the T300U is designed to allow ultra-sensitive CO measurements while still meeting the requirements for use as a US EPA compliance analyzer.The optical bench is enclosed in a temperature controlled oven, dramatically decreasing instrument noise and drift. The objective and field mirrors in the sample cell are gold plated to maximize signal to noise performance, while a temperature-controlled Nafion dryer on the inlet minimizes water interference caused by ambient humidity changes. Periodically, the T300U seamlessly corrects its baseline by routing the sample through a heated catalytic CO scrubber. This Auto Reference function corrects zero drift and reduces the effect of interferences.
