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Is there a difference between hand-held and fixed sensor enveloping readings?

April 26, 2017difference enveloping fixed hand-held readings sensor

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Is there a difference between hand-held and fixed sensor enveloping readings?

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Yes. Because the efficiency of the coupling interface for hand-held and fixed sensors differ, their amplitude readings may differ by a factor of 2 or 3. However, absolute amplitudes are not as significant as changes in amplitude measured over time by the same sensor (trend).