These powerful laboratory muffle furnaces are available for temperatures up to 1400 °C, 1500 °C, or 1600 °C. The durability of the SiC rods in periodic use, in combination with their high heating speed, make these furnaces to all-rounders in the laboratory. Heating times of 40 minutes to 1400 °C can be achieved, depending on the furnace model and the conditions of use.

• Tmax 1400 °C, 1500 °C, or 1600 °C
• Working Temperature 1550 °C (for models HTC ../16), increased wear and tear of heating elements must be expected in case of working at higher temperatures
• Model HTCT 01/16 with single phase connection
• High-quality fiber material, selected for the working temperature
• Housing made of sheets of textured stainless steel
• Dual shell housing for low external temperatures and high stability
• Optional flap door (HTC) which can be used as work platform or lift door (HTCT) with hot surface facing away from the operator (HTCT 01/.. only with lift door)
• Switching system with solid-state-relays, power tuned to the SiC rods
• Easy replacement of heating rods

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
• Square saggar for charging of up to three layers
• Lid for top saggar
• Manual or automatic gas supply system
• Adjustable air intake opening in the furnace door, exhaust air opening in the roof

Designed as tabletop models, these compact high-temperature chamber furnaces have a variety of advantages. The first-class workmanship using high-quality materials, combined with ease of operation, make these furnaces all-rounders in research and the laboratory. These furnaces are also perfectly suited for the sintering of technical ceramics, such as zirconium oxide dental bridges.

• Tmax 1600 °C, 1750 °C, or 1800 °C
• High-quality molybdenum disilicide heating elements
• Furnace chamber lined with first-class, durable fiber material
• Housing made of sheets of textured stainless steel
• Dual shell housing with additional fan cooling for low surface temperature
• Furnace sizes of 2, 4, or 8 liters
• Compact design with lift-door, opening upwards
• Adjustable air inlet
• Exhaust air opening in the roof
• Type B thermocouple
• Switching system with phase-angle firing thyristors (SCRs)

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
• Square saggar for charging of up to three layers
• Process control and documentation with Controltherm MV software package
• Protective gas connection
• Manual or automatic gas supply system

The electrically driven lift-bottom considerably allows for proper charging of the LHT/LB furnaces. The heating all around the cylindrical furnace chamber provides for an opitimal temperature uniformity. For model LHT 02/17 LB the charge can be placed in charge saggars made of technical ceramics. Up to three charge saggars can be stacked on top of each other resulting in a high productivity. Due to its volume model LHT 16/17 LB can also be used for applications in production.

• Tmax 1650 °C
• High-quality molybdenum disilicide heating elements
• Furnace chamber lined with first-class, durable fiber materials
• Outstanding temperature uniformity due to all-round furnace chamber heating
• Furnace chamber with a volume of 2 or 16 liters, table with large footprint
• Spacers to lift-up the saggars already installed in the table
• Precise, electric spindle drive with push button operation
• Housing made of sheets of textured stainless steel
• Exhaust air vent in the roof
• Type S thermocouple
• Switchgear with thyristor

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 furnace and load
• Square saggar for charging of up to three layers
• Protective gas connection
• Manual or automatic gas supply system
• Adjustable air inlet through the floor
• Process control and documentation with Controltherm MV software package

These furnaces were specially developed to determine combustion loss during annealing and for thermogravimetric analysis (TGA) in the lab. The complete system consists of the high-temperature furnace for 1600°C or 1750°C, a table frame, precision scale with feedthroughs into the furnace and powerful software for recording both the temperature curve and the weight loss over time.

• Technical description of the furnaces: see models LHT 04/16 and LHT 04/17
• Description of the weighing system: see models L 9/... SW

Due to their solid construction and compact stand-alone design, these high-temperature furnaces are perfect for processes in the laboratory where the highest precision is needed. Oustanding temperature uniformity and practical details set unbeatable quality benchmarks. For configuration for your processes, these furnaces can be extended with extras from our extensive option list.

• Tmax 1600 °C, 1750 °C, or 1800 °C
• Furnace sizes from 4 to 450 liters
• High-quality molybdenum disilicide (MoSi2) heating elements
• Parallel swivel door, chain-guided, enabling safe opening and closing without damage to the fiber insulation in the collar area, protection of user from radiation from the furnace
• Door labyrinth sealing provides for optimum energy efficiency and temperature uniformity
• Door area armored with stainless steel to avoid burn damages
• Reinforced floor as protection for bottom insulation as standard from models HT 16/16 upwards
• Over-temperature limit controller with manual reset for product and furnace protection
• Furnace chamber lined with first-class, durable fiber material
• Special ceiling construction with high durability
• Thermocouple, PtRh-Pt, Type B or Type S
• Vapor vent in the furnace roof

Additional equipment

• Cooling fan For cycle time acceleration furnace sized specific fans are installed. The fan speed is preselected per segment. The controller is automatically switched on and off. Hence, different speeds can be applied e.g. for binder removal or cooling. With HiProSystems-Controllers, lenear cooling is possible.
• Furnace in HDB design featuring fresh air pre-heating, exhaust gas ventilation and an extensive safety package for debinding and sintering in one process, i. e. without transfering the material from the debinding furnace to the sintering furnace.
• Motor-driven exhaust-air flap control
• Stainless steel exhaust gas hoods
• Catalytic or thermal afterburners
• Kiln furniture tailored to customer specifications
• Lift door
• Special heating elements for zirconia sintering provide for longer service life with respect to chemical interaction between charge and heating elements
• Protective gas connector and seal of furnace casing to allow purging of furnace with protective gasses
• Manual or automatic gas supply system
• Inner process box to improve the gastightness and to protect the furnace chamber against contamination

The high-temperature chamber furnaces HTC 16/16 - HTC 450/16 are heated by vertically hung SiC rods, which makes them especially suitable for sintering processes up to a maximum operating temperature of 1550 °C. For some processes, e.g. for sintering zirconium oxide, the absence of interactivity between the charge and the SiC rods, these models are more suitable than the alternatives heated with molybdenum-disilicide elements. The basic construction of these furnaces make them comparable with the already familiar models in the HT series and they can be upgraded with the same additional equipment.

• Tmax 1550 °C
• Dual shell housing with fan cooling for low shell temperatures
• Heating from both sides via vertically mounted SiC rods
• High-quality fiber insulation backed by special insulation
• Side insulation constructed with tongue and groove blocks provides for low heat loss to the outside
• Long-life roof insulation with special suspension
• Chain-guided parallel swivel door for defined opening and closing of the door without destroying the insulation
• Labyrinth sealing ensures the least possible temperature loss in the door area
• Specially reinforced furnace floor for accommodating high charge weights for model HTC 16 and above
• Exhaust air opening in the furnace roof
• Heating elements switched via SCR‘s
• Over-temperature limit controller with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

• For additional equipment see models HT 04/16 - HT 450/18

Model range HFL 16/16 HFL 160/17 is characterized by its lining with robust light refractory bricks. This version is recommended for processes producing aggressive gases or acids, such as under glass melting.

• Tmax 1600 °C or 1700 °C
• High-quality molybdenum disilicide (MoSi2) heating elements
• Insulation with light refractory bricks and special backup insulation
• Type B thermocouple
• Furnace sizes of 16 to 160 liters
• For the release of vapours, a 30 mm large exhaust hole is integrated into the roof of the furnace
• Over-temperature limit controller with manual reset for protection of material

Additional equipment

• Exhaust-air flap, manually or motor-driven for improved venting of the furnace chamber
• Fan for better ventilation of combustion chamber and for fast cooling of the furnace
• Protective gas connector and seal of furnace housing to allow purging of furnace with protective gasses
• Manual or automatic gas supply system