In electronics, a comparator is a device which compares two voltages or currents and switches its output to indicate which is larger. More generally, the term is also used to refer to a device that compares two items of data.
A test kit for measuring some of the parameters of pool water such as pH and Chlorine. A reagent tablet, liquid or powder is added to a sample of the pool water. A color develops in the sample which is the compared to a reference color chart. From the best match of the colors, the result can be directly read off. See also Photometer
(IEEE) A software tool that compares two computer programs, files, or sets of data to identify commonalities or differences. Typical objects of comparison are similar versions of source code, object code, data base files, or test results.
The comparator is used to compare source or data files byte by byte to determine all differences. Comparator functionality should include the use of keys or indexes to allow synchronization of files, and may also include the ability to mask portions of a record by specifying some position or named fields to ignore when performing the comparison.
An established test against which a proposed test is compared to evaluate the effectiveness of the proposed test. A comparator usually means an agent or modality approved for a similar indication. (See also definition for reference product.)