Specifications

 uidized temperature baths
Fluidized Sand Baths
With more than 50 years of experience in the  eld of temperature control, Techne has established
itself as a world leader in the design and manufacture of equipment used for both laboratory and
on-site temperature calibration, providing the calibration engineer with a precise dynamic stable
temperature source.
Exceptional temperature stability and uniformity make Techne  uidized baths the ideal choice
for critical heat treatment procedures. Pioneers in the development of  uidized bath technology,
Techne has a wide range of products capable of covering the temperature range –100°C to 700°C.
Techne Fluidized Baths, for laboratory, industrial, process, quality control and instrument shop use,
provide rapid heat transfer and precise temperature control, enabling you to calibrate and maintain
temperature sensitive instruments e ciently, economically, and safely. Techne Fluidized Baths o er
outstanding advantages of being dry, inert and non-corrosive, as well as being non-abrasive to
anything placed in them.
Aluminum oxide particles serve as the heat transfer medium and have no a ect on shape or size
of immersed objects. This medium consists of a loosely-packed mass of solid particles which are
agitated by a vertical  ow of gas. In the  uidized state, the aluminum oxide particles become mobile
and the bath as a whole displays many of the properties of a liquid. Visually when  uidized the
aluminum oxide looks like liquid boiling vigorously or molten lava bubbling. The bed of levitated
particles presents a very large surface area through which heat is transferred to immersed objects.
Typical heat transfer rates are 60 to 120 Btu-hr-sq ft-°F. (To the left you can see the cutaway diagrams
of a  uidized bath.)
Fluidized solids have no melting or boiling point, thus solidi cation which occurs in cooling salt
baths and fumes from hot oil baths are eliminated. Heat transfer characteristics between the  uid-
ized bed and the solid interface are similar to those of an agitated liquid - the key to  uidized bath
calibration e ciency.
Applications include:
Aerospace
-
Jet engine sensors particularly irregularly shaped sensors, which cannot be calibrated with
Dri-Block or liquid baths.
- Wiring looms from battery and engine sensors on transport aircraft.
Fuel cells systems
-
Heat source for a heating coil used to generate superheated steam, which is a safer alternative
to electric ovens and oil baths.
Engineering
-
Heat treatment of metals used in stress analysis testing.
- Heating of reactor vessels containing plastics samples.
Mining
-
Used to heat a reactor vessel with mineral samples when investigation oil and petroleum
generation.
Petrochemical
-
Used to test heavy ship oil in reactor vessels.
Shape setting
-
Used by leading manufacturers to shape- set nitinol stents and platinum/tungsten coils.
Overspill  ange
Fluidized sand
Air- ow
regulator
Air inlet
Fail safe unit
Energy
regulator
Outer case
Inner container
Insulation
Heater
Porous plate
Circulation of aluminuim oxide promotes
temperature uniformity.
Airborne particles created by the  uidized bed are
drawn in to a peripheral extraction ring
connected to a cyclone collector in the FB-08.
23