Measurement and Testing

  • Fast and reliable TDL analysis

Fast and reliable TDL analysis

Sep 25 2018 Read 811 Times

For gas analysis applications in fired heater control, Tunable Diode Laser (TDL) technologies have emerged as a reliable and fast response tool to ensure safety within the combustion process.

TDL measurement for carbon monoxide (CO) show a marked improvement in performance over alternative methods such as pellistor or thick film sensors, due to its light-based technology.

The realisation that a fuel-rich environment is a potential source of explosions has moved CH4 analysis from a largely ignored measurement to a key safety monitoring requirement.

The increasing use of low-NOx burners, which are highly effective at reducing unwanted NOx emissions, but run a cooler, larger flame is inherently less stable. This flame instability is leading to the requirement for improved flame-out protection, and customers who use natural or refinery gas as a fuel, have begun to use TDL analysers as part of the safety system.

Servomex’s TDL gas analyser, the SERVOTOUGH Laser 3 Plus combines the latest Wavelength Modulated Spectroscopy (WMS) measurement techniques with Servomex’s signal processing, to provide stable, repeatable results. Delivering a response within seconds, it is optimised for the measurement of O2, CO or a combination of CH4 and CO in hazardous environments.

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