An instrument for measuring the density or percentage of solids in
slurries flowing through pipes. It normally uses a gamma-ray source,
usually cesium-137 or cobalt-60, mounted in a lead-shielded holder on one
side of the pipe. A radiation detector is mounted on the opposite side.
Since the absorption of the gamma radiation, as it passes through the
slurry, varies as a function of the density of the slurry, the change in
radiation received by the radiation detector is representative of the
specific gravity or percentage of solids in the slurry.
See also: differential pressure flowmeter
Dictionary of Mining, Mineral, and Related Terms