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Certification of Accuracy
Lunometer® Measuring Instruments Certification of Accuracy

Lunometers are manufactured by printing line patterns on either vinyl or acrylic (often referred to as Plexiglas®.) The line patterns for the Lab Grade Lunometers have been created using equipment normally used to make the photo masks for semiconductor devices requiring accuracy measured in hundredths of a micron. (A micron is 1 millionth of a meter.) The only possible cause for measurement variation is the expansion or contraction of the material on which the lines are printed. Since the Lunometers are manufactured at approximately the same temperature as they are normally used, this variation is too small to be detected by the human eye.

All Lab Grade Lunometers are made by a printing company specializing in high definition, close tolerance production. This company adheres to documented manufacturing and quality assurance processes.

Final Inspection:

Our acceptance of each shipment of Lunometers is contingent on its passing a rigid inspection performed at H.P. Luhn & Associates. This inspection consists of selecting a random, statistically-valid lot from each shipment and performing measurements on a set of test grids that have been certified by a testing laboratory using test and measurement equipment traceable to the National Institute of Standards and Technology (NIST).

Based on the above, our instruments are certified as follows:

Lunometers are accurate within plus or minus one percent (+/- 1%) at any point over the entire measuring range of the instrument when used at a temperature between 60 and 90 degrees Fahrenheit.

In reality, Lunometers are more accurate than as stated above, and the only limitation is created by the skill, experience, and judgment of the person using it.


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thread counter cloth ©Copyright 2013 H.P. Luhn & Associates. Lunometer® is a registered trademark of H.P. Luhn & Associates. All rights reserved. Contact us for more information.