Fluid droplet size measurement

Yes.

Search this forum and maybe google it...I'm sure the Q has been asked before.

I've seen kit for measuring the size of particles from nebulisers...A sort of shadow-graph thingy with a built in microscope....

Del

Take 3D photo's vectorize and measure.

III. Process Liquid Analysis

1. Particle Analysis: Before determining the correct filtration system or element, one must know the type and size of particulate to remove. This can be determined through our laser sensor and batch particle counter. Virtually any process fluid can be filtered through filtration discs for microscopic analysis and run through the laser counter to determine particle counts and size distribution.

http://www.perryequipment.com/Lab_Services.asp?parent_id=ES&product=Lab%20Services

Droplets aren't particles that can be filtered then measured...uless I'm missing something...ha, maybe freeze the suckers...

You could try Malvern Instruments in the UK. I think they do equipment for this type of application.

I know this is being done at Argonne National Laboratory using a laser system of some sort. I would look in a trade publication like Processing, Chemical Engineering, or IEN News.

Yes, but it's expensive.

There may be cheaper methods, but I doubt they're as accurate and I expect they will be time consuming, such as optical diffraction methods. You can also look into Laser Doppler Velocimetry (LDV) but this is usually only used for measuring solid particles in fast moving streams. Check out this page: www.efluids.com/efluids/pages/products/ldv.htm

Also google this: difficulties in measuring liquid droplet size distributions using laser diffraction technique by Zaidi

These optical techniques are not proven!

That is difficult, considering the variety of variables, one of which is the cohesion forces involved that can vary.

I had googled it due to how this interest me, still looking.

http://hyperphysics.phy-astr.gsu.edu/Hbase/surten.html

phoenix911

Back in the 70's we once used a sensitive paper droplet collection technique. Some lab did the spot measurement measurement and counting, so there must be some sort of standardization on the technique.

This seems like it must be as cheap as you can get.

If they are all about the same size, you may be able to generate a diffraction pattern by shining a laser beam through. This method is used to control the drawing of glass fiber, I understand.