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Thermosel¢ē/Controllers
Viscosity
Determination At Elevated Temperatures
How
It Solves A Difficult Problem
The difficulty with viscosity measurements of hot melts and
liquids at elevated temperatures has been in maintaining
accurate temperature control that is consistent from sample to
sample, so that meaningful data could be obtained.
The
Brookfield Thermosel¢ē solves this problem by providing a
stable, precisely controlled sample environment. This, together
with the inherent accuracy of the Brookfield Viscometer, is
fundamental to the Thermosel¢ē System, which produces viscosity
measurements that are not only accurate, but entirely
reproducible.
Several factors contribute to the stable environment:
- non-fluctuating temperature
control
- small sample volume and
insulated sample chamber, which reduces temperature gradients
with the sample
- the rotating spindle, which
acts as a built-in stirring device
””
- Expedited
research and QC procedures
- Safe
viscosity measurements of materials up to 300oC
- Precise
temperature control within ?.5% of set point temperature
- Excellent
viscosity reproducibility
- Small
sample volume (8 to 13 ml)
- Defined
shear rates generated by coaxial cylinder geometry
- Manual
or programmable temperature control
- Digital
display of set point and Thermosel¢ē temperature to 0.1oC
or oF on controller
- Temperature
display switchable to oC or oF
- Disposable
sample chambers
- DIN
spindle geometry available
Various
spindles are available for use with the Thermosel¢ē System.
Selection is determined by the viscosity measurement range that
is required. Included with the Thermosel¢ē are a
thermo-container, safety guard and insulating cap, a
proportional controller with RTD probe, one spindle (others
available), one standard sample chamber, five disposable
chambers, sample chamber holder, extraction tools, and an
alignment bracket.
The
Model 106 Programmable Temperature Controller allows up to 10
pre-programmed test steps which include both a set temperature
and hold time at that temperature. This permits measurement of
viscosity-temperature data for any test sample. The Model 75
Temperature Controller (single set point) is also available.
SPINDLE
|
VISCOSITY
RANGE - Centipoise (mPa”¤s)
|
SHEAR
RATE (sec-1)
|
SAMPLE
VOLUME (mL)
|
LV
SERIES VISCOMETERS
|
SC4-18
SC4-31
SC4-34
|
LVT |
LVT
& LVDV-I+
|
LVDV-II+*
|
LVDV-III
|
1.32N**
0.34N
0.28N
|
9.5
10.0
9.5
|
5-10,000
50-100,000
100-200,000
|
3-10,000
30-100,000
60-200,000
|
1.5-30,000
15-300,000
30-600,000
|
1.2-30,000
12-300,000
24-600,000
|
RV
SERIES VISCOMETERS
|
SC4-21
SC4-27
SC4-28
SC4-29
|
RVT
|
RVDV-E
& RVDV-I+
|
RVDV-II+*
|
RVDV-III
|
0.93N**
0.34N
0.28N
0.25N
|
8.0
10.5
11.5
13.0
|
50-100,000
250-500,000
500-1,000,000
1,000-2,000,000
|
50-170,000
250-830,000
500-1,700,000
1,000-3,300,000
|
25-500,000
125-2,500,000
250-1,700,000
500-6,700,000
|
20-500,000
100-2,500,000
200-5,000,000
400-10,000,000
|
HA
SERIES VISOMETERS
|
SC4-21
SC4-27
SC4-28
SC4-29
|
HAT
|
HADV-E
& HADV-I+
|
HADV-II+*
|
HADV-III
|
0.93N**
0.34N
0.28N
0.25N
|
8.0
10.5
11.5
13.0
|
100-200,000
500-1,000,000
1,000-2,000,000
2,000-4,000,000
|
100-300,000
500-1,700,000
1,000-3,300,000
2,000-6,700,000
|
50-1,000,000
250-5,000,000
500-10,000,000
1,000-20,000,000
|
40-1,000,000
200-5,000,000
400-10,000,000
800-20,000,000
|
HB
SERIES VISCOMETERS
|
SC4-21
SC4-27
SC4-28
SC4-29
|
HBT
|
HBDV-E
& HBDV-I+
|
HBDV-II+*
|
HBDV-III
|
0.93N**
0.34N
0.28N
0.25N
|
8.0
10.5
11.5
13.0
|
400-800,000
2,000-4,000,000
4,000-8,000,000
8,000-16,000,000
|
400-1,300,000
2,000-6,700,000
4,000-13,300,000
8,000-80,000,000
|
200-4,000,000
1,000-20,000,000
2,000-40,000,000
4,000-80,000,000
|
160-4,000,000
800-20,000,000
1,600-40,000,000
3,2000-80,000,000
|
|