Top Hat Furnace LTH 12/3

This compact top hat furnace for laboratory applications provides easy handling of samples, fast heating and cooling cycles and particularly uniform temperatures profiles. It reaches 1000°C in under 20 minutes.

The use of double skin construction provides
a cool and safe outer case temperature. The
outer case is manufactured from zinc coated
sheet steel and finished with an attractive
stoved epoxy polyester finish.

The heated chamber, which accepts crucibles
and work pieces up to 200mm (h) x 140mm
(0), has an attractive stainless steel retractable
element cover which provides total operator
safety. The element chamber lifts away from
the hearth and is electrically operated by a
rocker switch located on the furnace base.
When opened, a cool air flow provides rapid
cooling and allows unrestricted access to the
hearth, permitting easy handling of the
furnace load. During loading/ unloading, the
elements are totally isolated from the working
area as they are fully withdrawn into the case,
keeping the hot face away from the operator
at all times.

Powerful free radiating coiled wire elements
are held firmly in the vacuum formed low
thermal mass insulation, which forms a cylindrical chamber allowing maximum heat transfer and temperature uniformity. The use of low thermal mass ceramic fibre insulation material provides rapid heating and fast cooling.

A version with a refractory metal bell jar fitted within the furnace chamber is also available, allowing samples to be treated under special sealed atmospheres, using a sand seal.

The basic controller is the Carbolite 201 which is a three term PID microprocessor controller with an adjustable ramp rate to set point; it also includes a process timer as standard. This controller is incorporated in the top of the furnace.

All other controllers are housed in a separate control box. The Eurotherm 2416CC is an advanced setpoint programming controller with eight segments, any of which can be a ramp, step or dwell; the Eurotherm 2408CP contains the same features as the 2416CC but provides 16 segments.

Top Hat Furnace Specifications