Appendix b — choosing a temperature bath liquid – Cannon Instrument CT-1000HT (High Temperature Contant Temperature Bath) User Manual
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CANNON
®
CT-1000HT Constant Temperature Bath
Revision 1.1a—June, 2007; CANNON
®
Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
CHAPTER
B
APPENDIX B — CHOOSING A
TEMPERATURE BATH LIQUID
The ideal bath liquid would possess low viscosity, high heat capacity, and
low vapor pressure over a wide range of temperatures. In addition, the
liquid should have a very high flash point and be relatively low in cost. If
the fluid is to be used in a kinematic viscosity bath where it is necessary
to view the instruments through the bath liquid, then it is important for
the liquid to be clear and without color. Unfortunately, no single fluid
meets all these requirements. When selecting a fluid, keep the following
guidelines in mind.
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Because no single fluid can be used at all possible bath temperatures, the
choice of a suitable fluid must begin by establishing the temperature
range over which the bath will be operated. The following is a list of
operating temperature ranges and some liquids suitable for use in these
ranges: