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US20150060663 Electron source and X-ray fluorescence analyser using an electron source  
An electron source of an X-ray fluorescence analyser includes a photon source (201) and a photoelectric converter (203, 204) for converting photons into electrons. An electron multiplier (203,...
US20090072737 Ultra violet flame sensor with run-on detection  
A UV flame sensor for detecting a run-on condition in a flame detector tube is disclosed. The UV flame sensor comprises a pair of secondary electrodes that are enclosed in a mesotube to form a...
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