How much sample should I send?

There's no simple answer here, but we can give you some guidelines. If the material is dry (eg. Powders) then something in the range 10 - 100 gm is usually enough. The finer it is, the less we need. If sieving is required (sample includes particles > 1 mm) then at least 20 gm should be provided.

With waters we need enough particles to get a good result. So if it is good dirty water, 0.5 litres should be plenty. If it is clear water, but you can see a few specks floating around, then we may need up to 10 litres.

If in doubt, contact us to discuss your particular problem.

Where and how should I send it?

Samples can be sent by post or by courier, depending on urgency and the nature of the material. Ensure that the samples are packaged appropriately for safe carriage. Our addresses are on the contact page.

How long does the analysis take?

We aim to have the results to you within 7 days of receiving your sample. Naturally we will respond more quickly if we can. If your need is especially urgent, contact us and we will see what we can do.

What sort of information do I get?

Our standard report (LLS) includes Sample Information, a Graph of the particle size distribution, Statistics (mean, etc.) and a Listing of the data. This is available in hard copy (by post), by fax or electronically (optional). Contact us if you need particular results or a special format.

How accurate is the result?

We are talking about two things here: Accuracy and Reproducibility.

Accuracy is a thorny issue because of the problem of defining what Particle Size really means. Suffice to say that accuracy is 'engineered into' the LLS instruments. The measurement is based on the 'first principles' of the physics light scattering. There is no calibration of the instrument, though controls are used to check for correct operation.