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Why do I need the plethysmograph? Can I plug the strain gauge directly into my chart recorder?

April 26, 2017chart directly gauge plethysmograph PLUG recorder strain

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Why do I need the plethysmograph? Can I plug the strain gauge directly into my chart recorder?

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Strain gauge plethysmography is quantitative and easy to use. Other types of plethysmographs are difficult or impossible to calibrate, so they are typically used only for qualitative applications. You cannot plug the strain gauge directly into the chart recorder and get anything the plethysmograph takes the changes in the strain gauge and creates the data sent to the chart recorder. © 2008 D. E. Hokanson, Inc.