ISSN:
1469-8986
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Medicine
,
Psychology
Notes:
A Barlow-type electromechanical strain gauge and an indium/gallium-in-rubber strain gauge were compared for linearity of output, replicability, stability, and sensitivity to temperature changes. Distension of the strain gauges was achieved by placing them on standard size glass dilators, while temperature changes were produced and monitored in a controlled environment. Both gauges demonstrated comparable and very linear outputs and both had high test-retest reliability. Variations in temperature affected the outputs for both gauges, although for neither did they affect the degree of linearity between pen deflection and circumference. The electromechanical strain gauge was marginally less sensitive to temperature changes than the indium/gallium gauge, although for neither was the degree of error introduced of great practical significance. Although the output from the electromechanical strain gauge was slightly less stable over time than that from the indium/gallium gauge, when all variables were considered, the former gauge was marginally preferred over the latter.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1469-8986.1985.tb01653.x
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