Temperature Range:
The temperature scale is shown in degrees Celsius. The
fluids’ general range of application is indicated by the shaded bands. Qualities
including pour point, freeze point, important viscosity points, flash point, boil-
ing point and others may be shown.
Freezing Point:
The freezing point of a fluid is an obvious limitation to stir-
ring. As the freezing point is approached high viscosity may also limit
performance.
Pour Point:
This represents a handling limit for the fluid.
Viscosity:
Points shown are at 50 and 10 centistokes viscosity. When viscosity
is greater than 50 centistokes stirring is very poor and the fluid is unsatisfactory
6331 Calibration Bath
User’s Guide
32
Fluid
(# = Hart Part No.)
Lower
Temperature
Limit*
Upper
Temperature
Limit*
Flash
Point
Viscosity
(centistokes)
Specific
Gravity
Specific Heat
(cal/g/°C)
Thermal
Conductivity
(cal/s/cm/°C)
Thermal
Expansion
(cm/cm/°C)
Resistivity
(10
12
-cm )
Halocarbon 0.8
#5019
–100°C (v)**
70°C (e)
NONE
5.7 @ –50°C
0.8 @ 40°C
0.5 @ 70°C
1.71 @ 40°C
0.2
0.0004
0.0011
Methanol
–96°C (fr)
10°C (fl,cc)
12°C
1.3 @ –35°C
0.66 @ 0°C
0.45 @ 20°C
0.810 @ 0°C
0.792 @ 20°C
0.6
0.0005 @ 20°C
0.0014 @ 25°C
Water
0°C (fr)
95°C (b)
NONE
1 @ 25°C
0.4 @ 75°C
1.00
1.00
0.0014
0.0002 @ 25°C
Ethylene
Glycol—50% #5020
–30°C (fr)
90°C (b)
NONE
7 @ 0°C
2 @ 50°C
0.7 @ 100°C
1.05
0.8 @ 0°C
0.001
Mineral Oil No.7
#5011
10°C (v)
166°C (fl)
168°C
15 @ 75°C
5 @ 125°C
0.87 @ 25°C
0.84 @ 75°C
0.81 @ 125°C
0.48 @ 25°C
0.53 @ 75°C
0.57 @ 125°C
0.00025 @ 25°C
0.0007 @ 50°C
5 @ 25°C
Silicone Oil Type
200.05 #5010
–40°C (v)**
130°C (fl, cc)
133°C
5 @ 25°C
0.92 @ 25°C
0.4
0.00028 @ 25°C
0.00105
1000 @ 25°C
10 @ 150°C
Silicone Oil Type
200.10 #5012
–30°C (v)**
209°C (fl, cc)
211°C
10 @ 25°C
3 @ 135°C
0.934 @ 25°C
0.43 @ 40°C
0.45 @ 100°C
0.482 @ 200°C
0.00032 @ 25°C
0.00108
1000 @ 25°C
50 @ 150°C
Silicone Oil Type
200.20 #5013
10°C (v)
230°C (fl, cc)
232°C
20 @ 25°C
0.949 @ 25°C
0.370 @ 40°C
0.393 @ 100°C
0.420 @ 200°C
0.00034 @ 25°C
0.00107
1000 @ 25°C
50 @ 150°C
Silicone Oil Type
200.50 #5014
30°C (v)
278°C (fl, cc)
280°C
50 @ 25°C
0.96 @ 25°C
0.4
0.00037 @ 25°C
0.00104
1000 @ 25°C
50 @ 150°C
Silicone Oil Type 550
#5016
70°C (v)
230°C (fl, cc)
300°C (fl, oc)
232°C
50 @ 70°C
10 @ 104°C
1.07 @ 25°C
0.358 @ 40°C
0.386 @ 100°C
0.433 @ 200°C
0.00035 @ 25°C
0.00075
100 @ 25°C
1 @ 150°C
Silicone Oil Type 710
#5017
80°C (v)
300°C (fl, oc)
302°C
50 @ 80°C
7 @ 204°C
1.11 @ 25°C
0.363 @ 40°C
0.454 @ 100°C
0.505 @ 200°C
0.00035 @ 25°C
0.00077
100 @ 25°C
1 @ 150°C
Silicone Oil Type
210-H
66°C (v)
313°C (fl, oc)
315°C
50 @ 66°C
14 @ 204°C
0.96 @ 25°C
0.34 @ 100°C
0.0003
0.00095
100 @ 25°C
1 @ 150°C
Heat Transfer Salt
#5001
180°C (fr)
550°C
NONE
34 @ 150°C
6.5 @ 300°C
2.4 @ 500°C
2.0 @ 150°C
1.9 @ 300°C
1.7 @ 500°C
0.33
0.0014
0.00041
1.7
Ω
/cm
3
*Limiting Factors — b - boiling point
e - high evaporation
fl - flash point
fr - freeze point
v - viscosity — Flash point test oc = open cup
cc = closed cup
**Very low water solubility, ice will form as a slush from condensation below freezing.
Table 2
Table of Bath Fluids
