comparator method

comparator method

[kəm′par·əd·ər ‚meth·əd]
(thermodynamics)
A method of determining the coefficient of linear expansion of a substance in which one measures the distance that each of two traveling microscopes must be moved in order to remain centered on scratches on a rod-shaped specimen when the temperature of the specimen is raised by a measured amount.
References in periodicals archive ?
Review of the data presented demonstrates equivalency between the protocols that use comparable internal standard concentrations and those for the comparator method (mean bias = 3.
Off-line optical comparator methods were popularized over 50 years ago.