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Proving
Rings from Morehouse Instrument Company
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 Morehouse
Proving Rings
The Calibration Standard Against Which All Others Are
Measured
The Morehouse Proving Rings are recognized wherever highly
accurate force measurement calibrations are performed
as the premier standard. This reputation has been earned
by years of uncompromising conformance to the principles
originally established and maintained by the United States
National Institute of Standards & Technology. Morehouse
is dedicated to the design, manufacture and application
of proving rings which can be used with confidence in
standards laboratories and throughout industry. The reliability,
repeatability and
accuracy of Morehouse Proving Rings are unequaled and
unchallenged by any other force measurement device. Only
direct loads of qualified deadweights are more precise.
The Ultimate Instrument
After assembly, the Proving Rings are calibrated against
known standards to ASTM specification E-74, either at
the United States National Institute of Standards & Technology
or in our laboratory using standards directly traceable
to the Institute. The characteristics of the Proving Rings
depend on the requirements of the intended application.
For this reason, Morehouse produces a series of Proving
Rings offering a range of performance specifications varying
primarily in degrees of accuracy. This permits you to
select the Proving Rings your calibrations require without
paying for unnecessary reserve accuracy.
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