Hydro 2000S

Small volume automated wet dispersion accessory

The Hydro 2000S is a fully automated small volume wet sample dispersion unit. It is most suitable for applications where the amount of sample or volume of dispersant needs to be minimized.

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Overview
How it works
Specification

Overview

Designed to provide automated wet sample measurements, the Hydro 2000S provides:

50-120ml dispersant volume.
Continuously variable pump and stirrer ensures bias-free sampling of dense materials.
Continuously variable sonication probe to aid agglomerate dispersion.
Compatible with autosampler option.
Full software control of all measurement functions, including sample dispersion and cleaning.

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How it works

Wet sample dispersion units use a liquid dispersant, aqueous or solvent based, to disperse the sample. In a wet dispersion, individual particles are suspended in a liquid dispersant. The wetting of the particle surfaces by the dispersant molecules lowers their surface energy, reducing the forces of attraction between touching particles. This allows them to be separated and go into suspension. In order to keep the sample suspended and homogenized it is recirculated continuously through the measurement zone.

For dispersants with high surface tension, such as water, the addition of a small amount of surfactant can significantly improve the wetting behavior and subsequent particle dispersion.

In order to disperse individual particles it is usual to apply some energy to the sample. Often this is through stirring or agitation, but for very fine materials or strongly bound agglomerates ultrasonic irradiation is sometimes used.

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