R 50/250/12 R 50/250/13 RT 50-250/11 RS 80/300/11 Tube Furnaces up to 1800 °C

These compact tabletop tube furnaces with integrated control systems can be used universally
for many processes. Equipped with a standard working tube of C 530 ceramic and two fibre plugs,
these furnaces have an unbeatable price/performance ratio.

• Tmax 1200 °C or 1300 °C
• Housing made of sheets of textured stainless steel
• Outer tube diameter of 50 to 120 mm, heated length from 250 to 1000 mm
• Working tube of C 530 ceramic including two fibre plugs as standard equipment
• Type S thermocouple
• Solid state relays provide for low­noise operation

Additional equipment

• Over-temperature limit controller with manual reset for thermal protection class 2 in
• accordance with EN 60519-2 as temperature limiter to protect the oven and load
• Charge control with temperature measurement in the working tube and in the oven chamber behind the tube, please see page 63
• Three-zoned design with HiProSystem control (heated length from 750 mm, for 1300 °C models)

These compact tube furnaces are used when laboratory experiments must be performed horizontally,
vertically, or at specific angles. The ability to configure the angle of tilt and the working height,
and their compact design, also make these furnaces suitable for integration into existing process systems.

• Tmax 1100 °C, 1300 °C, or 1500 °C
• Compact design
• Vertical or horizontal operation freely adjustable
• Working height freely adjustable
• Working tube made of C 530 ceramic
• Type S thermocouple
• Operation also possible separate from stａnd if safety guidelines are observed
• Control system integrated in furnace base

The RS tube furnaces can be used for either horizontal or vertical operation. Using a variety of accessories,
these professional tube furnaces can be optimally laid out for your process. By using different available
gas supply packages, operations can be performed under a protective gas atmosphere, vacuum, or even with flammable gasses.

• Tmax 1100 °C or 1300 °C
• Housing made of sheets of textured stainless steel
• Tmax 1100 °C: Type K thermocouple
• Tmax 1300 °C: Type S thermocouple
• Frame for vertical operation, which can also be retrofitted as additional equipment
• Hinged design for simple insertion of the working tube
• Working tube made of ceramic C 530 for operation in air included in scope of delivery
• Switchgear and control unit separate from furnace in own wall or standing cabinet

The RS tube furnace line can be custom-fit to your needs with a variety of extras. Starting with various
working tubes of different materials to protective gas or vacuum operation. For optimum temperature
uniformity, all RS furnaces are also available as three-zone tube furnaces with modern PLC controls.
The heat loss at the ends of the tube is compensated using this three-zoned control, and a longer
uniform zone is the result. An overview of the complete line of accessories can be found starting on page 64.

Additional equipment

• Charge control with temperature measurement in the working tube and in the oven chamber behind the tube
• Working tubes designed for process requirements
• Display of inner tube temperature with additional thermocouple
• Different gas supply packages (starting on page 64) for protective gas and vacuum operation
• Three-zone control for optimization of temperature uniformity
• Check valve at gas outlet avoids intrusion of false air
• Ceramic half pipe for heating elements and/or as support surface for the load
• Stａnd for vertical operation
• Base frame with integrated switchgear and controller

When the retention of the granular characteristics of the material is important, as in drying or calcining,
the rotary tube furnaces of the RSR product line provide for the optimal solution. The permanent rotation
of the working tube in one direction makes sure that the charge is constantly in motion. The furnaces
may be operated either horizontally with a quartz glass reactor or in a preset tilting angle with a quartz
glass tube for continuous conveying of the charge through the tube. Equipment like the filling funnel,
electrically driven feeder and outlet with conveying paddles in the tube can be added to
upscale these continuous furnaces into a small production plant.

• Design like RS models
• Tmax 1100 °C
• Type K thermocouple
• Compact unit, designed as tabletop model
• Optionally supplied with quartz glass process reactor or quartz glass tube
• Easy working tube or process reactor removal through beltless drive and hinged housing
• Infinitely variable drive (approx. 1-20 rpm)
• Good flooding of load with process gas due to inlet on one side and outlet on other side of tube

Additional equipment

• Gastight rotary feedthrough for connection to gas supply systems (suitable for operation in rough vacuum)
• Display of inner tube temperature with additional thermocouple
• Different gas supply systems
• Gas cooler at tube outlet
• Check valve at gas outlet avoids intrusion of false air
• Three-zone control
• Tube adaptor for alternative operation either with glass reactor or ceramic tube
• Tilting frame with adjustable tilting angle for conveying the powder through the tube
• Feeder with electrically driven screw conveyor and adjustable rotational speed
• Filling funnel with closable powder outlet
• Powder outlet with conveying paddles in the working tube at the tube end

The high-temperature tube furnaces are available in either horizontal (type RHTH) or vertical (type RHTV)
designs. High-quality insulation materials made of vacuum-formed fibre plates enable energy-saving operation
and a fast heating time due to low heat storage and heat conductivity. By using different gas supply systems,
operations can be performed under a protective gas atmosphere, vacuum, or even with flammable gasses.

• Tmax 1600 °C, 1700 °C, or 1800 °C
• MoSi2 heating elements, mounted vertically for easy replacement
• Insulation with vacuum-formed ceramic fibre plates
• Rectangular outer housing with slots for convection cooling
• Models RHTV with hinges for wall mounting
• Housing made of sheets of textured stainless steel
• Ceramic working tube made of material C 799 incl. fibre plugs operation under air
• Type B thermocouple
• Power unit with low-voltage transformer and thyristor
• Switchgear and control unit separate from furnace in separate floor standing cabinet

Additional equipment

• Over-temperature limit controller with manual reset for thermal protection class 2 in accordance
• with EN 60519-2 as temperature limiter to protect the oven and load
• Charge control with temperature measurement in the working tube and in the oven chamber behind the tube
• Working tubes designed for process requirements
• Display of inner tube temperature with additional thermocouple
• Gastight flanges for protective gas and vacuum operation
• Manual or automatic gas supply system
• Three- or five-zone control for optimization of temperature uniformity
• Check valve at gas outlet avoids intrusion of false air
• Stａnd for vertical operation

• Tmax 1500 °C
• Housing made of sheets of textured stainless steel
• High-quality fiber insulation
• Active cooling of housing for low surface temperatures
• Type S thermocouple
• Solid state relays provide for low-noise operation
• Prepared for assembly of working tubes with water-cooled flanges
• Ceramic tube, C 799 quality

Additional equipment

• Over-temperature limit controller with manual reset for thermal protection class 2 in accordance
• with EN 60519-2 as temperature limiter to protect furnace and load
• Charge control with temperature measurement in the working tube and in the oven chamber behind the tube
• Fiber plugs
• Check valve at gas outlet avoids intrusion of false air
• Working tubes for operation with water-cooled flanges
• Display of inner tube temperature with additional thermocouple
• Alternative gas supply systems for protective gas or vacuum operation