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The
ViscoScope VA-300L Range: 0.10 to 2,500.00 mPa.s x gr/cm3 Typically the VA-300L sensor is calibrated for a three decade range but is capable to cover more than 4 decades of viscosity measurement. The ViscoScope VA-300L sensor generates a very small torsional oscillation resonance of constant amplitude on the probe surface. By adjusting the amplitude, the sensor can even be configured for difficult applications. A closed PID loop controls the amplitude of system. Viscosity is being measured by extracting the viscosity signal from the PID control loop. Using well established as well as new PID control technology enables a large measurement range, long term stability and fast response. |
The entirely welded construction seals the sensor from the process. Utilizing an extremely small amplitude of torsional resonance motion and the welded, sealed construction, the internals of the sensor are not exposed to any wear and tear.
The ViscoScope VA-300L sensor can be mounted in any direction into a tank, reactor or pipe. The measurement can be made, where it is most important for the application. Current process parameters are made available for measurement and control purposes. Turbulent flow in a tank, reactor or pipe does not have an influence on the measurement.
Maintenance free operation of the ViscoScope sensor VA-300L provides low cost of ownership.
The sensor
is available for three different temperature ranges:
VA-300L-LT: Maximum Process temperature 130degC / 270degF
VA-300L-MT: Maximum Process temperature 300degC / 570degF
VA-300L-HT: Maximum Process temperature 450degC / 840degF
Dependent on the temperature classification, the temperature is measured with one or two Pt100 temperature sensors. The process temperature measurement is being done directly in the viscosity probe and at the same location at which the viscosity is being measured. A second Pt100 monitors the coil temperature.
Use of the sensor in a hazardous, classified area is accomplished via safety barriers. The sensor can be provided with different agency approvals. The ViscoScope
VA-300L sensor is compatible with the ViscoScope electronics VS-4450 and VS-B450.
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Technical Specifications
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Sensor
Dimensions
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Diameter
= 32mm / L = 187mm
Diameter = 1.25" / L= 7.5" |
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Viscosity
range in mPa.s x g/cm3
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0.10
to 2,500.00
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Calibration |
3 Decades (optional 4 Decades)
Computer assisted calibration with NIST traceable oils |
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Wetted parts 1) / housing |
316
(1.4571) / IP65
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Process
temperature 2)
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LT
-40 to + 130 dec C / -40 to +270 deg F
ST -40 to + 300 dec C / -40 to +570 deg F HT -40 to + 450 dec C / -40 to +840 deg F |
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Process
connection 3)
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Flange:
ASME 3" 300# or DN80 PN40 std.
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Process
pressure
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Dependent
on flange, max. 350 bar / 5,000 psig
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Resonance
frequency
Shear rate |
~
550 Hz
~ 3.450 sec -1 |
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Transmission
cable length |
Maximum
1,000 meters / 3,333 feet
(short cable length recommended for very low viscosities) |
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Speed
of flow
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Up
to 10m / sec or 33 feet / sec dependent on installation
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Reproductivity
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+/-
1% of reading or +/- 1 Digit |
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Accuracy
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+/-
2% of reading or +/- 1 Digit
OPTIONAL +/- 1% of reading or +/- 1 Digit |
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OPTIONS
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Non-active-extension
4)
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Eliminates
no flow areas in a pipe connection on a reactor or in a T-piece.
Can also be used to bridge gaps in open channel applications. Diameter = 45mm / 1.75", L = up to 100mm / 4.0" |
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Hazardous
area approved
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ATEX:
II 1/2 G EEx ia IIC T3 - T6Others on request |
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1) Hastelloy C22,
Duplex 2205, Teflon coating and other materials on request
2) Above 175 deg C / 350 deg F coil temperature air colling of the housing
is required
3) Flanges up to PN250 und 2500# ASME on request
4) Non-active extensions are available in various diameters and up to
500mm / 20" length
(*) Subject to change without notice.