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</html><thumbnail_url>https://scioninstruments.com/wp-content/uploads/2025/07/Figure-1-Stages-of-pulsed-flame-operation.jpg</thumbnail_url><thumbnail_width>376</thumbnail_width><thumbnail_height>211</thumbnail_height><description>Pulsed Flame Photometric Detector (PFPD), has a photomultiplier which looks at a flame within the detector. The signal is acquired from changes in colour of the flame. Each element has its own emission wavelength or colour (fluorescence). Band Pass Optical Filters are used to control which element is measured by filtering out light from other sources. The light from elemental emission is detected.</description></oembed>
