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Enter the fascinating world of monodisperse particles.....

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What are Particle Count Standards good for ?

Particle Count Standards do posses a well defined number of particles per mL which will be measured if the particle counter had been calibrated properly and if you followed the procedure written in the accompanying certificate.

Each Particle Count Standard Kit is ready-to-use, i.e. you can start to check your particle counter without any sample preparation immediately because each kit contains a blank, a particle suspension with magnetic stir bar and the certificate.
Meßergebnis PC2503-25

What is the General Count Procedure ?

Adjust your particle counter for three channels according the certificate. First four particle countings of 5.0mL each with the blank will be performed to check wether the device is really particle-free. The first result will be discarded (rinse and equilibration) and the final three results will be averaged. If there are less than 50 part./mL in total and less than 10 part./mL in the main channel then the particle counter is ready for the main particle counting with the particle suspension:
With gentle stirring of the magnetic stir bar the procedure above will be repeated. The average of the last three countings should be very close to the certificate's value. All measured numbers can be recorded into the 'Result Record Form' of the certificate. By this you document the correct counting property of the particle counting instrument together with the original certificate.

Which Types of Particle Count Standards are available ?

There are three types of Particle Count Standards. Two for countings in water and one for those in oil.
For particle counters used in pharmaceutical departments you can apply   PharmaCount1510 Kits or Sets   (Ph Series), otherwise the more general   Particle Count Standard Kits or Sets   (PC Series).
For count validations of 'oil particle counters' according to ISO- or NAS regulations the   ISO-MTD2.8 Test Standard   (Oi Series) is suitable.