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.
References in periodicals archive ?
As a matrix card, the Model 3731 offers users the flexibility to connect any of up to six differential instrument channels to any combination of 16 devices under test (DUTs).
The WMAP satellite launched in 2001 has on board only differential instruments working similarly to the DMR on COBE, so its data accounts only for the weak (dipole) component of the Background [2].
The anisotropy in the Background measured by the differential instruments is actually the same: DMR at COBE registered the anisotropy 3.
Therefore, the absolute and differential instruments located at the L2 point should manifest no difference in the measured temperature of the radiation.
More and more, hematology technology is done on automated differential instruments that provide three- or five-part diffs as part of the routine profile.
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