spray-breakup

Particle Size Measurement

Real-Time Spray Droplet and Particle Size Measurement

Measure the size and shape of particle, droplets or bubbles with image-based analysis. VisiSize online droplet sizing systems capture high-speed images of a particle cloud, spray (e.g. for water droplet size measurement) or bubble stream to give the drop size distribution. In addition to measuring the particle diameter distribution, Oxford Lasers imaging systems also provide real-time particle velocity and shape analysis.

  • Measure spray droplet size in real time
  • Measure particle or droplet velocity and direction
  • Measure individual particles
  • Capture images of the particle or droplet in flight
  • Make non-intrusive measurements
  • Make in-situ measurements
  • Report on-line, real-time results

Spray Droplet Size with Velocity and Direction

Visisize’s unique sizing algorithms allow simultaneous measurement of particle size and velocity with direction. This means that you can correlate the sizes of particles or droplets with their velocity. Discover whether the velocity gradient in your spray is related to size and work out what parameters you need to change to get the result you desire. Learn why VisiSize is an alternative to PDPA systems.

Non-Intrusive Online Analysis

Our powerful online analysis systems measure particle diameter, shape and velocity distributions for solids, liquid sprays and gases suspended in any transparent medium. No other droplet sizing system is as intuitive to use as direct imaging equipment.

Intuitive to Use

If you can operate a camcorder or digital camera, you can master a VisiSizer sizing system. There is no complex alignment or calibration procedure, and the VisiSize software handles all the hard parts for you. Discover how easy our systems are by learning about our software.

Air inclusion in a spray droplet, captured with a Visisize system

Image-based sizing measures shape

On the right is the first ever in-flight image of the output from an agricultural “air-inclusion” nozzle. From this image, taken from a VisiSize system, not only are the water drops non-spherical, but air bubbles are visible within them. Other measurement techniques such as PDA or laser diffraction would mis-size the water droplet without indicating they had done so – and you would never have known about the air inclusions.

A powerful research tool

VisiSizer systems also double as very powerful laser imaging systems. As well as capturing images for measurement, the systems can image the nozzle and the break-up and drop formation processes. This provides a very valuable insight into nozzle effects and problems. Combined with the quantitative diameter data image based sizing is an extremely powerful tool for R&D.

Applications

  • Fuel injector characterization
  • Agricultural spray characterization
  • Paint sprays
  • Pharmaceutical devices (MDIs, DPIs, nasal sprays)
  • Nozzle characterization
  • Fire suppression/extinguisher
  • Bubble column characterization
  • On-line particle sizing of solids in the production process

Oxford Lasers, Inc
2 Shaker Road, Unit B104, Shirley, MA 01464, USA

Oxford Lasers Ltd.
8 Moorbrook Park, Didcot, Oxon, UK, OX11 7HP

  • T: +44 (0)1235 810088 (general/service)
  • T: +44 (0)1235 814433 (micro-machining)
  • T: +44 (0)1235 812255 (imaging)
  • E: oxford.ltd@oxfordlasers.com

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