When the highest level of production quality assurance is needed and is dependent on the results of sieve test results, the most precise sieve with the smallest level of variation between sieve of the same mesh, the one choice are Endecotts brand Mid-Point Sieves.
As with all Endecotts Sieves, each one is individually made under the most stringent quality control procedures. They are manufactured in accordance with ISO 9001:2008.
The wire cloth is checked at every stage of manufacture with optical measuring instruments. The final inspection is a precision measurement of apertures, and sieve frame dimensions.
For Mid-Point Sieves mesh is individually selected to permit the construction of a test sieve with sieving medium (mesh) specification tolerances reduced by 30% from the ISO or ASTM specification. Each sieve is supplied with a Calibration Certificate giving the range of tolerances and measurements taken.
In addition to use as high level quality control devices, mid point sieves are often used to check the performance of working sieves.