Particle Size and Sieve Standards from Whitehouse Scientific
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With an experience of over 25 years, Whitehouse scientific is Europes highest ranking certification laboratory for primary methods of particle size analysis. Sigma- Aldrich offers a wide range of polydisperse particle size standards and sieve calibration standards from Whitehouse scientific. |
Certified Polydisperse Particle Size Standards
These NIST and NPL traceable standards were commissioned by the Bureau of Certified References (BCR) and are measured by a large international team including the 20 top laboratories in the field of particle size. For the certification of the glass particles, several unambiguous primary methods such as microscopy, sieving, sedimentation and Coulter counter were used.
The standards are delivered in Sets of 10 vials in quantities suitable for any method of analysis without further subdivision.
Table 1. Polydisperse Particle Size Standards from Whitehouse Scientific
| Cat. No. |
Product Name |
Pack size |
Add to Cart |
| 51358 |
Polydisperse Particle Standard 0.1 - 1 µm |
10 x 0.02 g |
|
| 42459 |
Polydisperse Particle Standard 1 - 10 µm |
10 x 0.1 g |
|
| 05724 |
Polydisperse Particle Standard 3 - 30 µm |
10 x 0.05 g |
|
| 94078 |
Polydisperse Particle Standard 3 - 30 µm |
10 x 0.1 g |
|
| 80847 |
Polydisperse Particle Standard 10 - 100 µm |
10 x 0.25 g |
|
| 40579 |
Polydisperse Particle Standard 10 - 100 µm |
10 x 0.5 g |
|
| 08718 |
Polydisperse Particle Standard 10 - 100 µm |
10 x 1 g |
|
| 57563 |
Polydisperse Particle Standard 50 - 350 µm |
10 x 0.5 g |
|
| 78456 |
Polydisperse Particle Standard 50 - 350 µm |
10 x 2.5 g |
|
| 94773 |
Polydisperse Particle Standard 150 - 650 µm |
10 x 2.5g |
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Certified Sieve Calibration Standards
The Sive Calibration Standards from Whitehouse Scientific offer a unique method of calibrating sieves with traceability to NIST and NPL. The glass microspheres are delivered in sets of single shot bottles in order to eliminate operator sampling errors.
The calibration requires only about 2 minutes following a simple procedure: The glass microspheres are placed into the sieve which is shaken either manually or mechanically, until an equilibrium has reached and no more particles pass the sieve.
Figure 1: Calibration graph for the 63µm sieve standard
By weighing the sieve and the single shot bottle before and after the equilibration, the percentage of microspheres passing the sieve can be calculated and the mean aperture size of the sieve can thus be determined using the calibration graph supplied with the test certificate. Figure 1 shows an example of a calibration graph for the 63µm sieve standard.
Table 2. Sieve Calibration Standards from Whitehouse Scientific
| Cat. No. |
Product Name |
Mesh # |
Calibration Range |
Pack size |
Add to Cart |
| 12655 |
Sieve Standard 45 µm |
325 |
42.0 - 50.8 |
5 x 1.0 g |
|
| 49500 |
Sieve Standard 63 µm |
230 |
56.6 - 70.4 |
5 x 1.0 g |
|
| 42696 |
Sieve Standard 75 µm |
200 |
67.1 - 82.8 |
5 x 1.0 g |
|
| 61847 |
Sieve Standard 106 µm |
140 |
91.4 - 117 |
5 x 1.0 g |
|
| 18867 |
Sieve Standard 125 µm |
120 |
112 - 139 |
5 x 1.0 g |
|
| 75446 |
Sieve Standard 150 µm |
100 |
134 - 167 |
5 x 1.5 g |
|
| 43390 |
Sieve Standard 180 µm |
80 |
161 - 199 |
5 x 1.5 g |
|
| 41544 |
Sieve Standard 250 µm |
60 |
226 - 281 |
5 x 2.5 g |
|
| 67246 |
Sieve Standard 300 µm |
50 |
270 - 333 |
5 x 2.5 g |
|
| 78900 |
Sieve Standard 500 µm |
35 |
440 - 557 |
5 x 2.5 g |
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