What are calibration samples?

Endecotts calibration samples are microspheres formed of soda-lime glass that range from 3.35 mm down to 20 microns. Because of the precise nature and extent of the range of spheres, samples can be supplied to enable the accurate calibration of individual sieves to an accuracy of approx 1µm.

The microspheres pass over, almost, the total surface of the sieve enabling more apertures to be examined than with any other method.  Consequently, calibration samples are one of the most accurate methods of sieve calibration available.

How to accurately calibrate test sieves in a matter of minutes

1. Select the calibration sample size that matches the aperture size of the sieve.

2. Place a weighed sample on the sieve under test and shake for 2 minutes.

3. Weigh the sample again and calculate the percentage passing through the sieve.

4. Simply read off the percentage passing along the graph supplied with every Calibration Sample.

5. The mean average aperture size in microns can be read off against the graph.

Endecotts glass microspheres are calibrated by an external laboratory who are recognised as one of the leading particle analysis laboratories by the BCR, and by 20 other leading European particle size analysis laboratories.

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