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TG Gradient Tube Furnaces

The TG Gradient Tube Furnace Range is a compact split tube furnace specifically designed to provide a temperature gradient along the length of the heated zones. They use free radiating wire elements embedded within the insulation of the furnace body. The benefit of this design is its flexibility; with tube adapters, the same furnace can be used with various tube diameters.

  • Max Temp: 1200°C
  • Furnace Ø: 60, 125mm
  • Heated Length(s): 425, 600mm
  • Number of heated zones: 2 zones or 3 zones
  • Orientation: all models available are orientated either horizontally or vertically
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The TG Gradient Tube Furnace Range are compact split tube furnaces specifically designed to provide a temperature gradient along the length of the heated zones. They use free radiating wire elements embedded within the insulation of the furnace body. The benefit of this design is its flexibility; with tube adapters, the same furnace can be used with various tube diameters.

The furnace body is split into two halves and hinged at the rear; pneumatic dampening struts at either end provide a smooth opening. The ability to open the furnace makes it easier for operators to exchange work tubes or insert vessels, such as reactors, with end flanges that would make them difficult to insert into a non-split furnace.

The TG2 tube furnace includes a 25 mm long unheated zone barrier between the two 200 mm heated zones, while the TG3 includes two 75 mm long unheated zone barriers between the three 150 mm heated zones. Each heated zone has its temperature controller and thermocouple.

Carbolite Gero’s new tube furnace range is at the pinnacle of furnace design. The culmination of over 80 years of experience in thermal engineering, combining the latest technological developments with solid construction, high-quality components and a sleek, modern aesthetic.

HIGH-QUALITY HEATING ELEMENTS

  • Excellent temperature uniformity
  • Fast heat-up and cool-down rates
  • Unsurpassed temperature uniformity along the entire heated length
HIGH-QUALITY THERMAL INSULATION
  • Low energy consumption
  • Low external case temperature
  • Designed for longevity

TEMPERATURE CONTROL & COMMUNICATIONS

TG gradient tube furnaces are equipped with RS485 communications and a Carbolite Gero EPC3016P1 programmable temperature controller with 24 segments for each heated zone as standard.

OPTIONS

  • Over-temperature protection (recommended to protect valuable contents and for unattended operation)

LOW ENERGY CONSUMPTION

 

Carbolite Gero’s new tube furnaces are very energy-efficient. Their high-quality thermal insulation is designed for longevity, low case temperature and outstandingly low energy consumption. Using a Carbolite Gero tube furnace reduces your energy cost and carbon footprint.

UP TO 50% LESS ENERGY IS REQUIRED! COMPARISON WITH EQUIVALENT COMPETITOR PRODUCT

MODIFIED ATMOSPHERE & VACUUM EQUIPMENT

Carbolite Gero tube furnaces may have many options to accommodate modified atmosphere and/or vacuum applications.

OPTIONS
  • A range of additional work tubes, end seals and complete work tube packages
  • Vacuum packages with a choice of rotary vane pumps or turbomolecular pumps
  • Inert gas package modules allow for the use of up to 3 non-reactive gases (available with either manual or automatic control)

THAT’S COOL! LOW CASE TEMPERATURE

Carbolite Gero tube furnaces are designed with user safety in mind.

The robust construction and high-quality thermal insulation ensure that external case temperatures are much lower than in other models.

Not only does this help mitigate the risk of injury to the operator, but the reduction in the heat escaping the furnace ensures a comfortable working environment and means less energy is wasted during use.  Carbolite Gero can help you keep a cool head when the heat is on!

 

Accessories

Large Selection of Work Tubes Insulation Plugs & Radiation Shields
Wide choice of tube diameters, lengths & materials Prevent heat loss & improve temperature uniformity

Mounting Configurations

TG gradient tube furnaces are supplied mounted on top of the control box. The furnace body can easily be detached and separated for remote operation.

This configuration includes a 2-metre cable (furnaces with 125 mm Ø incl. plug and socket) between the furnace body and control box. This flexible arrangement allows for easy conversion to optional mounting arrangements e.g. attaching to a vertical stand, a mounting bracket or inside a fume cupboard.

Furnace Body on Top of Control Box Detachable Furnace Body Option: 4 M Cable Extension
Configuration for heated lengths
up to 600mm
Easy conversion to optional
mounting arrangements
4m long extension results in a total of 6m
between furnace body and control box
(125 mm Ø models include plug and socket)
Option: Vertical Stand Option: Mounting Bracket
A vertical mounting stand for
the furnace body
Used to mount the furnace body
to customer equipment

Technical Data

TG3 12/60/600 TG2 12/125/425
Max Temp (C) 1200 1200
Number of heated zones 3 2
Heat-up time (mins) 134
Furnace Ø (mm) 60 125
Heated lengths (mm) 600 425
Recommended tube length
for use in air (mm)
880 750
Recommended tube length
for used with modified
atmosphere (mm)
1050 1000
Dimensions:
External H x W x D(mm)
575 x 795 x 480 665 x 665 x 575
Control Box H x W x D(mm) 230 x 785 x 480 230 x 655 x 480
Max Power (W) 2000 1860
Weight (kg) 56 71
PLEASE NOTE
  • Heat-up time is measured to 100 °C below max, using an empty quartz tube & insulation plugs
  • Heat up rate when using an optional ceramic work tube must be limited to 5 °C/per min
  • Holding power is measured at continuous operating temperature
  • Temperature gradients are measured with insulation plugs fitted
  • The maximum continuous operating temperature is 100 °C below the maximum temperature
  • All furnaces are equipped with thermocouple-type N

TG GRADIENT TUBE FURNACE RANGE - FAQ

WHAT IS A GRADIENT TUBE FURNACE?

A gradient tube furnace is a split tube furnace with multiple heated zones fitted with zone barriers. The zone barriers are pieces of insulation that fit between each heating element module and help reduce the amount of heat transfer between heated zones.

HOW ARE THE GRADIENTS IN A GRADIENT TUBE FURNACE CONTROLLED?

Each heated zone is controlled by its independent temperature controller, so it is possible to set different temperatures in each zone. The zone barriers reduce the heat transfer between zones, increasing overall control and enabling the operator to create a temperature gradient across the heated length, e.g., zone 1: 500°C, zone 2: 450°C, zone 3: 400°C.

WHICH APPLICATIONS REQUIRE A GRADIENT TUBE FURNACE?

Many applications require a gradient tube furnace, such as chemical vapour deposition (CVD), in which a substance is vaporized in the hottest zone, transported along a work tube via a carrier gas, then condensed upon a substrate in the coolest zone. Gradient tube furnaces are ideal for this process, as each end of the furnace can operate at a different temperature, with a temperature gradient between them.

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