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Techne FB-08LT Fluidised Bath
The FB-08LT Fluidised bath is a rectangular bench
standing unit. It incorporates a cylindrical fluidised bath,
three term digital set point controller, digital
temperature indicator and two flowmeters for
regulating fluidised air and liquid nitrogen (LN2) supply
Temperature range -100degC to 200degC
Control stability, as good as +/-0.2degC
Working volume diameter x depth 165 x 385mm
Built in air dryer
Digital temperature indication
Digital temperature set point
This model is specially designed for low
temperature operation down to -100degC but
is also capable of operating up to +200degC.
The unit includes all of the special features
listed for Model FB-08 fluidised bath.
The method of operation is similar to Model
FB-08 except that it has provision for
connection to a liquid nitrogen (LN2) supply
and is fitted with an air drying system
(compactly mounted on the back of the unit).
An air dryer is necessary to avoid
condensation of water when the fluidising air
at ambient temperature is introduced into the
cold fluidised bed. The LN2 supply is
regulated by a flowmeter on the front of the
unit (which actually controls the flow of
nitrogen gas leaving the bath) and the gas is
exhausted together with fluidising air (which
has passed through the bed) to atmosphere.
At low temperatures the top opening of the
bed is completely closed, using the blanking
plate provided, to avoid warm ambient air
being drawn into the bed. The LN2 flows in a
helical tube wrapped around the outside of
the cylindrical stainless steel container holding
the fluidised bed. Temperature is sensed by a
platinum resistance thermometer and is
indicated on a large digital display.
The entire system is completely selfcontained.
All that is required is a supply of
liquid nitrogen and air, an electrical supply
and you have a dry, safe calibration bath
working down to -100degC with considerable
For a larger view, please click on the photo above.
Sensors for calibration should be suspended
as close as possible to the centre of the
working volume. Nothing should be put into
the bath which obstructs more than one third
of the cross-sectional area of the fluidised
standard controller Eurotherm 2204E
The Eurotherm is simple to operate and
provides 3 term (PID) control functions.
Digital set and readout of the bath
temperature. Power is
switched via solid state
relay. Parameters within the
microprocessor are factory
pre-set to obtain the
optimum performance from
the fluidised bath.
Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.
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