CO measurement module for flue gas analysis - ETA Process ...
CO measurement module for flue gas analysis - ETA Process ...
CO measurement module for flue gas analysis - ETA Process ...
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<strong>CO</strong> 2<strong>measurement</strong> <strong>module</strong> <strong>for</strong> testo 350 M/XLDirect <strong>CO</strong> 2<strong>measurement</strong> in <strong>flue</strong> <strong>gas</strong>A <strong>CO</strong> 2infrared sensor was designed especially <strong>for</strong> <strong>CO</strong> 2<strong>measurement</strong>. The dimensions of this sensor are identical to thetesto electrochemical <strong>measurement</strong> <strong>module</strong>s. Like the other<strong>measurement</strong> <strong>module</strong>s, the <strong>CO</strong> 2infrared sensor can be very easilyinstalled in the sensor slot of the testo 350 M/XL.Lasting value:Even measuring units already in use can be easily upgraded.Special attention was paid to the lasting value of testo 350 M/XL inthis respect.Diagram of the <strong>CO</strong> 2infrared sensorMeasuring <strong>gas</strong>Reference receiverAbsolute pressuresensorOne sensor <strong>for</strong> all applications:A non-dispersive infrared-sensor (NDIR) is used in testo 350 M/XL<strong>for</strong> direct <strong>CO</strong> 2<strong>measurement</strong>. This sensor is a Testo developmentwith a complete measuring range from 0 to 50 Vol.% <strong>CO</strong> 2 .The sensor works according to the one channel-double beamprocess: two infrared-receivers with two different optical filters arebuilt in a miniature cuvette (sample and reference filter).IR-emitterSpecial windowIR radiationFilterSample receiver<strong>CO</strong> 2displayAnalysingelectronicsP absdisplayOnly app. 4.27 µm radiation can pass through the sample filter.This wavelength is absorbed by <strong>CO</strong> 2. The reference filter on theother hand is permeable <strong>for</strong> a radiation of app. 4.0 µm. Noradiation-absorption by <strong>gas</strong>es takes place in this radiation range.DetailsReference filterSample filterSafety:Reliable functioning and accurate <strong>measurement</strong>s are guaranteedby self-diagnosis with the reference channel. Possible driftscaused by beamer wear or dirt are corrected automatically by thesensor.Additional checks or adjustments of this automatic drift correctioncan be carried out very easily by the user using the enclosedabsorption filter.For very high demands on accuracy, special calibration in a limitedmeasuring range can be made by the user with the cal <strong>gas</strong>.Availability:Two special windows are used <strong>for</strong> protecting the IR emitter, filterand receiver against corrosive <strong>gas</strong> components.All advantages at a glance:• Highly accurate measuring range of 0 to 50Vol.%• Not affected by absolute pressure in<strong>flue</strong>nce and temperaturefluctuations• Robust and long term stability• Reliable <strong>measurement</strong> results by automatic monitoring function• Highly accurate due to easy reset and adjustment <strong>for</strong> specialmeasuring ranges• Highly accurate O 2<strong>measurement</strong> with testo 350 by eliminating<strong>CO</strong> 2in<strong>flue</strong>nce at high concentrations• Convenient Pitot tube <strong>measurement</strong> with automatic <strong>gas</strong> density<strong>analysis</strong> using testo 3503
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