Single particle characterization (minute measurement volume) 
At Forschungszentrum Jülich, we have used the Dpv extensively and successfully for over 15 years to better understand and optimize our thermal spray processes. Its unique capability to simultaneously measure the temperature, velocity and size of individual particles and to perform cross-sectional maps of the spray plume has had a tremendous impact on our activities in the fields of process development, parameter optimization and quality management.
Dr. Georg Mauer
Head of Thermal Coating Technology Team
Institute of Energy and Climate Research (IEK-1)
Forschungszentrum Jülich GmbH, Germany
References
Aachen University
Concordia University
FZ-Juelich
GE Global Research
National research Council Canada
NRIM
Sandia National Laboratories
SUNY Stony Brook
University West
Xian Aerospace Materials Institute
Aachen University
Concordia University
FZ-Juelich
GE Global Research
National research Council Canada
NRIM
Sandia National Laboratories
SUNY Stony Brook
University West
Xian Aerospace Materials Institute
Single particle characterization (minute measurement volume) 
Simultaneously measures temperature, velocity, size and flux of up to 4,000 particles per second 
Histograms with full distributions (not only mean values) 
Computer-controlled cross-sectional mapping of spray plume properties Dpv evolution
innovative technology
In thermal spray, a material initially in the form of solid powder or wire is fed to the high-temperature spray torch to be melted and accelerated toward the parts to be coated. Before impinging on the substrate, the material is in the form of liquid droplet/particles, ranging from 1 to 150 microns in size, depending on the application. The particles typically travel at velocities from 50 to 1200 m/s, depending on the type of process/spray conditions used and their surface temperature may vary from 1,000° to 3,500° Celsius. The Dpv evolution measures the infrared radiation emitted by the liquid droplets and uses that data to calculate the individual particle’s temperature, velocity and size.
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Capable of providing individual particle characteristics for most commercially available spray material.
Temperature measurement from 1,000° to 4,000° Celsius
Velocity measurement from 5 to 1,200 m/s
Diameter measurement from 10 to 300 microns
Temperature measurement from 1,000° to 4,000° Celsius
Velocity measurement from 5 to 1,200 m/s
Diameter measurement from 10 to 300 microns
DPV Evolution technical specifications
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Measurement ranges
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Particle temperature range
(size and emissivity dependent)1000°C and higher at 2.5% resolution
1832°F and higher at 2.5% resolution
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Particle velocity range
5 - 1200 m/s
16.3 - 3900 ft/s at 0.5%
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Particle diameter
5 – 7 % resolution
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Center plume position
0.2 mm resolution
0.008 in. resolution
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Particle relative flow
normalized a.u.
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Measurement volume information
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Dpv measurement volume
0.25 mm3
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Sensor head working distance
100 mm (4 in.) from spray torch axis at 90°
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XY scanning unit travel range
100 mm x 100 mm
4 in. x 4 in.
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Product options
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Cps-2000
for cold particles characterization
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Plumespector
for spray plume cross-sectional intensity profile
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Substrate temperature pyrometer
From -18 to 525 °C
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Dimensions and weight
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Sensor head
90 mm x 33 mm
3.5 in. x 1.3 in. -
Xy scanner
300 mm x 125 mm x 330 mm
11.8 in. x 4.9 in. x 13 in. -
Main enclosure
560 mm x 260 mm x 660 mm
22 in. x 10.2 in. x 26 in. -
Touch screen
430 mm / 17 in.
1024 x 768 minimum resolution
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Plant supplies
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Power requirements
100 /120 – 200 /230 VAC, 50-60 Hz, auto-switch
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Plant to supply
20-30 psi of clean, dry compressed air
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Dpv evolution