Posts tagged Coulter Principle

But What Is a Coulter Counter?

What is a Coulter Counter

For the last couple of years I have been writing posts on Coulter Counter applications, developments and history, some of which have been quite detailed, but this month I thought I would pause and give a simple summary for those who are new to the subject. Continue reading But What Is a Coulter Counter?

Moving the Lab Forward

I’ve just been watching a short video on the Beckman Coulter website. Entitled ‘Lab Forward’, it’s one of several videos that really help to give a flavour of the company and its philosophy. Continue reading Moving the Lab Forward

Multisizer 4e


A new member has been added to the Coulter Counter family, from Beckman Coulter, in the shape of the Multisizer 4e. With this instrument, particles and cells as small as 0.2 microns can be accurately counted and measured. Continue reading Multisizer 4e

Investigating Sea Water

Investigating sea waterToday my research on the Beckman Coulter website has turned up some useful application notes on using a Coulter Counter to count and size particles and cells in sea water. You can find and download the document yourself by visiting the site, clicking on the appropriate product area and then choosing ‘Literature’ in the right-hand column. Continue reading Investigating Sea Water


Haematology - glb_bci_153873Haematology – the branch of medicine concerned with study and treatment of the blood – was the very reason for the Coulter Counter’s invention and it continues to be at the heart (forgive the pun) of Beckman Coulter’s activities today. Continue reading Haematology

Beckman Coulter

Dr Arnold O Beckman

Dr Arnold O Beckman

If you’re a user of Coulter Counters and the Coulter Principle, you will undoubtedly know something of their inventor, Wallace H Coulter. His name lives on through his many achievements, and in the name of the company that continues to perfect and manufacture Coulter Counters today: Beckman Coulter. I would now like to tell you a little about that company and its founder, Dr Arnold O Beckman. Continue reading Beckman Coulter

Coincident Events

I’ve mentioned it before, but I think it’s well worth repeating, that Coulter Counter users can open up a mine of useful background information and application advice if they go to the Beckman Coulter website, Once you’re on the site, go to the relevant product section and then in the right-hand column click on ‘Literature’. In my latest search I came across some notes on ‘coincident events’ in relation to use of the Coulter Principle. Continue reading Coincident Events

What Can a Coulter Counter Measure?

What can Coulter Counter measure

The more I read about this subject, the more I’m impressed by the versatility of the Coulter Counter as a particle characterisation instrument. In answer to the question in the heading, the obvious answer is the size and number of particles in a sample. The full answer, of course, is much deeper than that. Continue reading What Can a Coulter Counter Measure?

Coulter Counter Application in Copper Plating

A basic laboratory set-up to demonstrate the copper plating electrochemical process

A basic laboratory set-up to demonstrate the copper plating electrochemical process

The manufacturing of printed circuits often makes use of an electrochemical process known as acid copper plating. One of the potential pitfalls in this process is contamination of the electrolyte with particles, so manufacturers must keep a close eye on the numbers and sizes of any particulates present. Which is where a Coulter Counter comes in… Continue reading Coulter Counter Application in Copper Plating

Particle Size and Concentration in Oils


If you go to the Beckman Coulter website,, look for the type of product in which you are interested – say Coulter Counter – and then click on ‘Literature’ in the right-hand column, you will open up a whole world of information. For example, I’ve just come across some application notes for use of a Beckman Coulter Multisizer 3 Coulter Counter in determining the size and concentration of particles in oils. Continue reading Particle Size and Concentration in Oils