The TransTemp transparent tube furnace was originally developed at the Lincoln Laboratory on the campus of MIT. Unlike conventional furnaces, the TransTemp becomes transparent at approximately 600°C, which makes it possible to see a process as it takes place inside the furnace. TransTemp transparent furnaces use a gold mirror that reflects infrared radation and acts as an insulator. The use of only a gold mirror for insulation minimizes mass and allows for very fast heat up and cool down rates. The maximum recommended operating temperature of the TransTemp tube furnace is 1000°C.
TransTemp tube furnaces are constructed using three coaxially mounted tubes. The outermost tube is Pyrex glass that has a gold mirror on its inner surface. Gold is highly reflective of infrared energy and acts as an insulator. Gold is also ideal for a transparent furnace because it is a poor reflector of visible light. The second tube is a quartz shield that protects the gold mirror. Coaxially mounted inside of the quartz shield is a resistive element. The element is made up of a series of fixed brazed coils. The exact temperature profile will depend on the design of the element. The third tube is a quartz tube or muffle, which extends beyond the ends of the furnace and passes through the center of the heating element.
In conventional tube furnaces using packed or porous insulation, the temperature is generally uniform over only the central third of the heated length. Outside this region, the temperature decreases significantly due to heat loss at the ends. In the TransTemp tube furnace, uniform reflection of infrared radiation evenly distributes the heat throughout the entire length of the tube. Because the mirror is uniform, it has uniform radial heat loss. With the ends capped, the TransTemp tube furnace will provide a uniform temperature along 60% of its length.
The table below lists some of the more common sizes that we have built in the past. If you have a custom size request, please contact us and we will work with you to meet your specific needs.
|TTL-1.5-0-12-1B||6.0" 152mm||5.625" 143mm||3.0" 76mm||8.375" 213mm||9.625" 244mm||12.0" 305mm||1.5" 38mm||16.0" 406mm||1575||110||1-1-40-110-E15PK
|TTL-1.5-0-20-1B||6.0" 152mm||5.625" 143mm||3.0" 76mm||8.375" 213mm||9.625" 244mm||20.0" 508mm||1.5" 38mm||24.0" 610mm||2449||110||1-1-40-110-E15PK
|TTL-2.25-0-20-1B||8.0" 203mm||5.825" 148mm||3.0" 76mm||8.375" 213mm||9.625" 244mm||20.0" 508mm||2.5" 64mm||24.0" 610mm||3419||220||1-1-40-220-E15PK
Typical Heating and Cooling Rate Graph for the TransTemp Tube Furnace
Typical Uniformity Graph for the TransTemp Tube Furnace
- Integrated circuit breaker
- Single set point controller
- (optional programmable controller)
- Table top control cabinet
|Amperage Rating||20 amp||40 amp|
|Exterior Dimensions (WxDxH)||14”x14”x6”||14”x14”x6”|
- Visibility Unobstructed viewing of samples, thermocouple placement and process procedures.
- Low mass Heats up quickly, and possesses a compact design.
- Cleanliness No contamination from fiber insulating material.
- Uniformity At least +/- 2°C over 60% of the length of the heated chamber.
- Internal temperature: 300°C = External temperature : 54°C
- Internal temperature: 419°C = External temperature : 119°C
- Internal temperature: 630°C = External temperature : 173°C
- Internal temperature: 814°C = External temperature : 215°C
- Internal temperature: 1000°C = External temperature : 287°C
- Longest = IBM Tokyo, Japan = 57mm OD x 7926mm
- Largest Diameter = Aichi Steel, Japan = 200mm OD x 500mm
- Smallest = NASA, Cleveland = 23mm OD x 50mm
- Longest single section = 1500mm
- Largest Diameter = 300mm OD
- Smallest Diameter = 25mm OD
All furnaces are of the same design. Only the dimensions change.
- Minnesota Mining and Manufacturing
- Naval Electronics Laboratory Center, South Dakota
- Naval Research Center, Washington
- Bell Telephone
- North American Rockwell
- Esso Research
- Eastman Kodak
- United States Bureau of Standards
- U.S. Air Force, Hanscom Field
- U.S.A.F. – Wright Patterson Air Force Base
- EG & G, Inc.
- Rockwell International
- Marshall Space Flight Center
- Landseas Corporation
- Philip Morris
- Hewlett Packard
- University of California – Berkeley
- University of California – Los Angeles
- Carnegie-Mellon University
- University of Utah
- University of Southern California at Los Angeles
- Purdue University
- Massachusetts Institute of Technology
- Polytechnic Institute at Brooklyn
- University of Washington
- Colorado State University
- Harvard University
- University of Wisconsin
Partial list of our International customers:
University of S. Wales
University of Wollongong
University of Toronto
University of Reading
French Atomic Energy Commission (C.E.A.)
Universite de Strasbourg
Berliner Handels-Kontor Heinz Lindenberg
Indian Institute – Madras
Arya-Mehr University of Technology
Semi Conductor Devices
Isreal Atomic Energy
Dinichi Trading Company
Ishikawa Trading Company
- New Zealand
Department of Science and Industrial Research
Scole Polytechnique Federal de Lausanne
Instituto Venezolano de Investigaciones Cientificas