What is ISO 21501 for calibrating particle counters?
There is a new ISO standard for calibrating particle counters. It is ISO 21501 and it is intended to provide a calibration procedure and verification method for particle counters, so as to minimize the inaccuracy in the measurement result by a counter, as well as the differences in the results measured by different instruments. Instruments that conform to ISO 21501 are used for the classification of air cleanliness in cleanrooms as well as the measurement of the number and size distribution of particles in various environments. This enhanced standard has not yet been adopted by many of our customers. However, we have updated our SOP to include the seven (7) minimum data points required by the new standard. Integrated Service Solutions has the capability of calibrating particle counters to the new ISO standard both in our Metrology Lab and in the field. If you are interested in adopting the new standard, please let us know and well be happy to give you more details. Click here.
