differential instrument

differential instrument

[‚dif·ə′ren·chəl ′in·strə·mənt]
(engineering)
Galvanometer or other measuring instrument having two circuits or coils, usually identical, through which currents flow in opposite directions; the difference or differential effect of these currents actuates the indicating pointer.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Therefore, the absolute and differential instruments located at the L2 point should manifest no difference in the measured temperature of the radiation.
The WMAP satellite, unfortunately, has on board only the differential instruments (working like the DMR on COBE).
More and more, hematology technology is done on automated differential instruments that provide three- or five-part diffs as part of the routine profile.(10) Yes, we do have such instruments in some of our labs; but they are expensive, and smaller laboratories can get along fine without them.
Full browser ?