The Multisizer 4 Coulter Counter

coulter counter instrumentTo demonstrate the advanced technology and versatility of coulter counters, let’s have a close look at the Multisizer™ 4 Coulter Counter® from Beckman Coulter®. Meritics considers this to be, quite simply, the most versatile and accurate particle sizing and counting analyser on the market.

In common with other coulter counters, it uses the Coulter Principle to give precise, high-resolution information on size distributions in terms of number, volume and surface area – all in one measurement.

It will analyse particles ranging in size from 0.4 µm to 1600 µm and, importantly, its response is not affected by the colour, shape, composition or refractive index of those particles.

Precision and resolution have been taken to new heights by the Multisizer 4, thanks to its Digital Pulse Processor (DPP). This provides ultra-high resolution, multiple channel analysis and a level of accuracy that other instruments cannot match.

High-speed digitalisation of the signal not only allows multiple characters to be used, for more accurate characterisation of the particles, but makes dynamic size measurement possible too.

The DPP also analyses and stores data for each particle. This information can be processed and formatted in many different ways, or saved for further analysis at a later date – which means there is no need to re-test the sample.

Operation of the instrument, controlled via the computer, is user-friendly and intuitive. Beginners find the step-by-step instruction software easy to follow, while more experienced users are guided by simple menus. A user-selectable automatic start-up routine adds to the system’s time efficiency.

In keeping with its all-round versatility, the Multisizer 4 has an extended dynamic range and comes equipped with a volumetric metering pump which is compatible with both aqueous and organic fluids. It will perform well even in in dusty environments and its mercury-free metering system avoids any pollution risk.

The design of the Multisizer 4 incorporates Smart Technology, which ensures that the conditions under which samples are analysed are uniform and repeatable – for consistent, reliable results. It includes a new fluid management system, EZAccess, which simplifies the handling of reagents and waste. Other useful features include electronic aperture blockage detection.

In short, the designers seem to have developed the perfect sizing and counting tool for researchers, quality controllers and other analysts.