We are herein pleased to introduce our new product, FLUOSTAR® fluorescent microspheres, for the community of flow visualization. The FLUOSTAR® microspheres are designed for FLUORESCENT PIV (particle image velocimetry). The efficacy of fluorescence is appreciated in a number of PIV applications since it can boost the signal-to-noise ratio. However, such fluorescent particles, particularly those available commercially, are not always satisfactory as a flow tracer due to the disadvantage of the poor emission efficiency, mismatched density, undesirable size, or the high cost. All these concerns are well solved for FLUOSTAR® particles. We would like to emphasize the prominent emission efficiency of orange-color fluorescence with a green-color light illumination. The strong fluorescence can be even observed by sight with a 5 mW laser pointer. Besides, the relatively low cost realizes FLUORESCENT PIV in industrial large-scale flows. As such, our mission is to contribute to extend the frontier of PIV applications as a reliable fluorescent particle supplier. See our latest application note!!! FLUOSTAR® microspheres are even used to evaluate coronary artery bypass grafting by analyzing the hemodynamics in surgical medicine.


1) Excellent brightness 2) Large-volume industrial use 3) Dry particles 4) Excellent water dispersibility 5) Excellent water stability 6) Moderate size dispersity 7) Uniform spherical shape 8) Minimal photobleaching 9) Minimal dye leaking 10) No swelling or Shrinking 11) Good mechanical stability


The initial application of FLUOSTAR in Tmographich PIV by TU Delft

Experiments have been performed in Taylor-Couette setup in Aero and Hydrodynamics Laboratory in TU Delft (F. Ravelet, R. Delfos, J. Westerweel, Physics of Fluids, Vol.22, No.5, 2010 ). Tomographic PIV system involves 4 Imager Pro XL cameras. Nd-YAG Double Pulse laser is used for volumetric illumination. The dimensions of the measurement volume are 20 x 40 x 10mm in circumferential, axial and radial directions respectively. The Fluostar fluorescent microsphere particles have been used for seeding. Particle diameter is 15 micrometers. 570 nm LP filters have been used for filtering the non-fluorescent illumination during the image acquisition. The images for non-florescent case have been recorded with same seeding, but without using the filters. A typical example for the images acquired with florescent particles given in Figure 1.


Figure 1 Experimental image with fluorescent particles in Tomographic PIV

Two examples for the images with non-florescent particles are given in Figure 2 and 3 below. The deflections on the surface of the cylinder and the reflections of the laser light are visible in figures. It should be noted that, it is almost impossible to distinguish the individual particles from the background.


Figure 2 Experimental image with non-fluorescent particles (not FLUOSTAR)


Figure 3 Experimental image with fluorescent particles "FLUOSTAR"

Downloads (please click following items to downloads)

・   [NEW]Technical handbook of fluorescent PIV
・   [NEW]Movie
・ Leaflet 
・ Technical Instruction Manual 
・ Free sampling trial was ended. Thank you.



Kogakuin University, Tokyo University ofScience, Waseda University, Keio University, Tokyo University, HokkaidoUniversity, etc (over 30 in May, 2010)

The United States Purdue University, Denison University
Nederland Delft University of Technology
AustraliaCSIRO Minerals


ICMF2010 International Conference on Multiphase Flow 2010
Free sample available at KANOMAX exhibition booth
fPIV demonstration
5/30 - 6/4Florida, USA
ISFV14  The International Symposium on Flow Visualization 2010
Free sample available at EBM Corp. exhibition booth
fPIV demonstration
6/21 - 6/24Daegu, Korea
FLUOSTAR® in a PIV handbook in press (Prof.dr.ir. Jerry Westerweel TU Delft)TBADelft
Fluorescent PIV using FLUOSTAR® in a PIV workshop (TU Delft)TBADelft
PIV09:8th International Symposium on PIV
FLUCOME:10th International Conference on Fluid Control, Measurement, and Visualization.

See also top page

Fluorescent PIV (fPIV)

Application notes

・Single-phase liquid flows

・Muti-phase flows

・Industrial large-scale flows

・Near-wall flows

・Micro flows

・Stereo PIV

Bubbly flow: (left) non-fluorescent particles, (right) FLUOSTAR 

Near-wall flow (vascular model): (left) non-fluorescent particles, (right) FLUOSTAR

Authorized by Waseda Unviersity, TWIns, Dr. T.Yagi

FLUORESCENT PIV IN BIOMEDICAL FLOWS: A silicone-rubber elastic replica of human cerebral aneurysm was made using rapid-prototyping techniques in a full-scale and patient-specific manner based on medical imaging, such as MRI and CT. FLUORESCENT PIV using FLUOSTAR® successfully visualizes the near-vessel flow without any light reflection, which allows an accurate measurement of near-wall flow parameters, such as wall shear stress.

Particle specification 

  Substrate Material Carboxy-modified acrylate resin
  Refractive Index 1.560 (Polymer) 
  Temperature Resistant up to 100 ℃
  Fluorescence dye Rhodamine B (Excitation 550nm / Emission 580nm)
  Density 1.1g/cm^3
  Diameter 15um
  Size uniformity Less than 20% C.V.
  Bottle quantity 1g, 5g
  Expiration dates > 24 months
  Package includes: MSDS (Material Safety Data Sheet)
  Storage Store at room temperature in a dry area. A bottle should be tightly sealed.
  Handling Glove and respiratory protection are strictly required.


We accept a major credit card. Please feel free to ask questions, if any. FLUOSTAR can be shipped immediately by your order.

To order the FLUOSTAR® E-mail: fluostar@ebm.vc or FLUOSTAR ONLINE SHOP