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Calibration Bath Fluids

Bath Fluids
Bath Fluids
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  • Highlights
  • Description
  • Specifications
  • Models and Accessories
  • Knowledge and Information

Full line of bath fluids covering temperature ranges from –100°C to 550°C

Fluke Calibration carries a full line of bath fluids for liquid calibration baths covering temperature ranges from –100°C to 550°C.

Finally, there’s a convenient source for small quantities of bath fluids for any temperature range. Why pay for more than you need?

Viscosity, volatility and other properties that change with temperature affect the performance of fluids in controlled baths and circulators. Fluke Calibration has tested and used each of the fluids we sell. Over the ranges recommended in the following table, each fluid remains at a low enough viscosity to be adequately pumped or stirred. Whether your application is industrial or critical lab calibration work, Hart fluids give you top performance and stability.

For temperature ranges too high for oils, we have a bath salt with a viscosity in the molten state similar to the viscosity of water. For your convenience, it is shipped in a granular form, making it easy to fill your bath.

Between its melting point of 150°C and 550°C, this salt has the highest temperature stability and uniformity available in a bath fluid. It does not smoke like oils or give off dust like “sand" or fluidized alumina baths. Check with your bath manufacturer before using this salt to make sure your equipment is compatible. Fluke Calibration offers three standard bath models and custom-designed units for use with this salt.

Fluid specifications 

It’s important to understand a few specifications before selecting a bath fluid. We’ve seen bath fluids advertised with a temperature range that spans from the freezing point to the flash point or beyond.

For example, type 710 silicone oil has a freezing point of –22°C, but freezing point has nothing to do with the point at which the oil becomes so thick it cannot be properly stirred. Type 710 oil should really only be used down to about 80°C. It’s a viscosity issue, not a freezing-point issue. Usable range is the question. Suitability for calibration work is the specification that counts.

The usable viscosity range is determined by your bath’s stirring or pumping design. Fluke Calibration baths can be operated using fluids with up to 50 centistokes viscosity. This gives you additional usable range in the lower temperature levels of the fluid.

Some baths advertised as calibration baths require fluids with 10 centistokes or less viscosity to operate properly. The usable ranges in our table on the previous page assume the use of a Fluke bath.

In addition to range and viscosity issues, there are a number of other issues to consider when choosing a bath fluid. The other considerations are:

  • Thermal characteristics
  • Lifetime
  • Change in characteristics due to temperature cycling
  • Absorption of water from the air
  • Vaporization—fumes and fume hood requirements
  • Expansion due to heat
  • Contamination—mixing oils or introducing contamination with unclean probes
  • Conductivity properties
  • Effects of using fluids outside of their range—fire, explosion, polymerization
  • Effects of altitude on boiling point
Model Description
5019 Halocarbon 0.8 Cold Bath Fluid
Usable Range§: –100°C to 70°C
Flash Point†: n/a
5023 HFE Cold Bath Fluid
Usable Range§: –75°C to 100°C
Flash Point†: n/a
5022 Dynalene HF/LO
Usable Range§: –65°C to 58°C
Flash Point†: 60°C
5020 Ethylene Glycol (Mix 1:1 with water)
Usable Range§: –30°C to 90°C
Flash Point†: n/a
5010 Silicone Oil Type 200.05
Usable Range§: –40°C to 130°C
Flash Point†: 133°C
5012 Silicone Oil Type 200.10
Usable Range§: –30°C to 209°C
Flash Point†: 211°C
5013 Silicone Oil Type 200.20
Usable Range§: 10°C to 230°C
Flash Point†: 232°C
5014 Silicone Oil Type 200.50
Usable Range§: 30°C to 278°C
Flash Point†: 280°C
5017 Silicone Oil Type 710
Usable Range§: 80°C to 300°C
Flash Point†: 302°C
5011 - Mineral Oil Mineral Oil
Usable Range§: 10°C to 175°C
Flash Point†: 177°C
5001 - Bath Salt Bath Salt, 125 lb.‡
   Potassium Nitrate 53%
   Sodium Nitrite 40%
   Sodium Nitrate 7%
Usable Range§: 180°C to 550°C
Flash Point†: n/a

‡ 125 lb. bath salt fills a 7.9-gallon tank.

§ Atmospheric pressure affects the usable ranges of some fluids. The temperatures quoted are at sea level.
† Flash point is the temperature at which a vapor (not the fluid) will ignite if exposed to an open flame. When the flame is removed, the vapor will stop burning. (Open cup method.)

Model Name Description
5001

Bath Salt, 125 lb (fills a 30 liter [7.9 gal] tank)

5010

Silicone Oil Type 200.05, –40 °C to 130 °C

5011

Mineral Oil, 10 °C to 175 °C

5012

Silicone Oil Type 200.10, –30 °C to 209 °C

5013

Silicone Oil Type 200.20, 10 °C to 230 °C

5014

Silicone Oil Type 200.50, 30 °C to 278 °C

5017

Silicone Oil Type 710, 80 °C to 300 °C,

5019

Halocarbon 0.8 Cold Bath Fluid, –100 °C to 70 °C

5020

Ethylene Glycol, –30 °C to 90 °C (mixed 1:1 with water)

5022

Dynalene HF/LO, –65 °C to 58 °C

5023

HFE Cold Bath Fluid, –75 °C to 100 °C

Accessories common to all models:

Accessory Description
5010-1L

Silicone Oil Type 200.05, 1 liter (0.26 gal)

5010-3.8L

Silicone Oil Type 200.05, 3.8 liters (1 gal)

5010-18.9L

Silicone Oil Type 200.05, 18.9 liters (5 gal)

5011-1L

Mineral Oil, 1 liter (0.26 gal)

5011-3.8L

Mineral Oil, 3.8 L (1 gal.)

5011-18.9L

Mineral Oil, 18.9 L (5 gal.)

5012-1L

Silicone Oil Type 200.10, 1 liter (0.26 gal)

5012-3.8L

Silicone Oil Type 200.10, 3.8 liters (1 gal)

5012-18.9L

Silicone Oil Type 200.10, 18.9 liters (5 gal)

5013-1L

Silicone Oil, Type 200.20, 1 liter (0.26 gal)

5013-3.8L

Silicone Oil Type 200.20, 3.8 liters (1 gal)

5013-18.9L

Silicone Oil Type 200.20, 18.9 liters (5 gal)

5014-1L

Silicone Oil Type 200.50, 1 liter (0.26 gal)

5014-3.8L

Silicone Oil Type 200.50, 3.8 liters (1 gal)

5014-18.9L

Silicone Oil Type 200.50, 18.9 liters (5 gal)

5017-1L

Silicone Oil Type 710, 1 liter (0.26 gal)

5017-3.8L

Silicone Oil Type 710, 3.8 liters (1 gal)

5017-18.9L

Silicone Oil Type 710, 18.9 liters (5 gal)

5019-1L

Halocarbon 0.8 Cold Bath Fluid,1 liter (0.26 gal)

5019-3.8L

Halocarbon 0.8 Cold Bath Fluid, 3.8 liters (1 gal)

5019-18.9L

Halocarbon 0.8 Cold Bath Fluid, 18.9 liters (5 gal)

5020-1L

Ethylene Glycol, 1 liter (0.26 gal)

5020-3.8L

Ethylene Glycol, 3.8 liters (1 gal)

5020-18.9L

Ethylene Glycol, 18.9 liters (5 gal)

5022-1L

Dynalene HF/LO, liter (0.26 gal)

5022-3.8L

Dynalene HF/LO, 3.8 liters (1 gal)

5022-18.9L

Dynalene HF/LO, 18.9 liters (5 gal)

5023-3.8L

HFE Cold Bath Fluid, 3.8 liters (1 gal)

Application Notes
application/pdf icon How to select a calibration bath fluid (3.29 MB)
SDS (Safety Data Sheets)
3M™ Novec™ 7500 Engineered Fluid
application/pdf icon 5001 Bath Salt - Tempering A-HTS Pink (120.19 KB)
application/pdf icon 5010 XIAMETER™ PMX-200 Silicone Fluid 5 cSt (302.46 KB)
application/pdf icon 5011 Drakeol® 7 LT MIN OIL NF (130.16 KB)
application/pdf icon 5012 XIAMETER™ PMX-200 Silicone Fluid 10 cSt (305.34 KB)
application/pdf icon 5013 XIAMETER™ PMX-200 Silicone Fluid 20 cSt (304.76 KB)
application/pdf icon 5014 XIAMETER™ PMX-200 Silicone Fluid 50 cSt (303.56 KB)
application/pdf icon 5017 DOWSIL™ 710 Fluid Safety Data Sheet (357.87 KB)
application/pdf icon 5019 Halocarbon PCTFE Oils (110.59 KB)
application/pdf icon 5020 Ethylene glycol (398.38 KB)
application/pdf icon 5022 Dynalene HF-LO (107.64 KB)
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