Functional Principle
Levitronix has developed a Bearingless Viscosimeter for the semiconductor industry, which is based on magnetic levitation technology. With the Levitronix technology, a slice shaped rotor is suspended and driven by the magnetic field of a motor/bearing stator through the wall of the viscosimeter casing without mechanical contact. The viscosimeter head consists of two parts: a viscosimeter rotor, which contains a rotor magnet, and a viscosimeter casing. Both components are fabricated from chemically resistant high-purity fluorocarbon resins. The levitated rotor slice rotates within the process fluid. By avoiding mechanical friction, the motor torque is determined by the fluid friction losses in the measurement gap and therefore is proportional to fluid viscosity. This leads to a highly accurate viscosity measurement and also helps to minimize particle generation.
Contact us at (800) 270-7175 for more information on Levitronix Viscosimeters.
Figure 1: Interfacing options
System Benefits
Figure 2: Bearingless Viscosimeter BVM-1.1
Continuous in-line viscosity measurement with fast response time
Ultra-pure design with virtually no particle generation
Wetted components are fabricated from PTFE or PFA
Interface with a variety of display and control capabilities
Easily mounted in any direction pipe line or bypass stream
No mechanical wear with reduced down time and maintenance costs
Figure 3: Exploded view of bearingless viscosimeter BVM-1.1
Figure 4: Interfacing with bearingless viscosimeter BVM-1
Specifications:
Propery
BVM
1.1
BVM
1.2
Viscosity Range:*
0.5
– 30 mPa.s1
30 – 100 mPa.s1
100
– 2000 mPa.s
Accuracy:*
1%
FS
Repeatability:
0.3%
FS
Flow:*
0.5
– 20 Liter/min
10–
100 mL/min
Pressure Drop:
<
0.15 bar
Max. Pressure:*
2.5
bar
1.5
bar
Installation:
in
any orientation
Fittings:*
1/2"
Flaretek
3/8"
Flaretek
Material of Wetted Parts:
PTFE,
PFA
Input Voltage:
24
VDC
Interface:
PLC,
RS232, Control Panel
* Please contact ES-Technologies at (800) 270-7175 for
special requirements.
1. Different viscosimeter rotors necessary.
