Amphenol Kaye CTR-40, User Manual, Page: 38 / 84

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7 General Operation
7.1.10.3 Mineral Oil
Mineral oil or paraffin oil is often used at moderate temperatures above the
range of water. Mineral oil is relatively inexpensive. At lower temperatures
mineral oil is quite viscous and control may be poor. At higher temperatures
vapor emission becomes significant. The vapors may be dangerous and a fume
hood should be used. As with most oils, mineral oil expands as temperature in-
creases. Be careful not to fill the bath too full to avoid overflows when heated.
The viscosity and thermal characteristics of mineral oil is poorer than water so
temperature stability will not be as good. Mineral oil has very low electrical
conductivity. Use caution with mineral oil since it is flammable and may also
cause serious injury if inhaled or ingested.
7.1.10.4 Silicone Oil
Silicone oils are available which offer a much wider operating temperature
range than mineral oil. Like most oils, silicone oils have temperature control
characteristics, which are somewhat poorer than water. The viscosity changes
significantly with temperature and thermal expansion also occurs. These oils
have very high electrical resistivity. Silicone oils are fairly safe and non-toxic,
but can be fairly expensive.
7.1.11 Fluid Characteristics Charts
Table 2 and Figure 4 on pages 28 and 29 have been created to provide help in
selecting a heat exchange fluid media for your constant temperature bath.
These charts provide both a visual and numerical representation of most of the
physical qualities important in making a selection. The list is not all inclusive.
There may be other useful fluids not shown in this listing. The charts include
information on a variety of fluids, which are often used as heat transfer fluid in
baths. Because of the temperature range some fluids may not be useful with
your bath.
7.1.11.1 Limitations and Disclaimer
The information given in this manual regarding fluids is intended only to be
used as a general guide in choosing a fluid. Though every effort has been made
to provide correct information we cannot guarantee accuracy of data or assure
suitability of a fluid for a particular application. Specifications may change and
sources sometimes offer differing information. Amphenol Advanced Sensors
cannot be liable for any personal injury or damage to equipment, product or
facilities resulting from the use of these fluids. The user of the bath is
responsible for collecting correct in- formation, exercising proper judgment,
and insuring safe operation. Operating near the limits of certain properties
such as the flash point or viscosity can compromise safety or performance.
Your company’s safety policies regarding