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
• High-quality fibre 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)
• Adjustable air intake opening in the furnace door, exhaust air opening in the roof
• 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
• Spacer recommended to be placed under the bottom saggar for better temperature uniformity
• Manual or automatic gas supply system

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 fibre 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
• With lift door, whereby the hot side is away from the operator
• 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
• Spacer recommended to be placed under the bottom saggar for better temperature uniformity
• Protective gas connection
• Manual or automatic gas supply system

The electrically driven lift-bottom considerably facilitates charging of the LHT/LB(R) furnaces. With their all-round heating of the cylindric chamber, these furnaces achieve outstanding temperature uniformity. Model LHT 02/16 LBR is specifically recommend when possible contamination is an issue. A ceramic retort between the charge and the heating elements optimally protects the furnace against chemical contamination. The load can be placed in saggars made of technical ceramics. Up to three saggars can be charged and provide for high output. As additional equipment these furnaces can be furnished with a cooling system using compressed air which is induced to shorten the process cycle.

• Tmax 1600 °C or 1700 °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
• Tubular plasma ceramic retort for the LBR version to prevent a certain level of contamination and to improve temperature uniformity
• 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
• Adjustable air inlet through the floor
• Exhaust air vent in the roof
• Type B 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, particularly effective in the LBR version with retort
• Forced-Air Cooling Package for model LHT 02/LBR for shorter process cycles The forced-air cooling package can be installed in models LHT 02/16 LBR and LHT 02/17 LBR. The furnace will be equipped with a quick lock for compressed air and a valve which can be activated by means of the extra function in the controller. To protect the charge, the cooling air will be injected behind the ceramic retort in the furnace chamber. Cooling times can be cut by about 45 minutes.
• 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 fibre insulation in the collar area, protection of user from radiation from the furnace
• Door labyrinth sealing provides for optimum energy efficiency and temperature distribution
• Door area armored with stainless steel to avoid burn damages
• Reinforced floor as protection for bottom insulation as standard from models HT 32/16 upwards
• Over-temperature limit controller with manual reset for product and furnace protection
• Furnace chamber lined with first-class, durable fibre 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.
• Automatic control of vapor vent flaps
• Stainless steel exhaust gas hoods
• Catalytic or thermal afterburners
• Kiln furniture tailored to customer specifications
• Lift door
• Protective gas connector and seal of furnace casing to allow purging of furnace with protective gasses
• Manual or automatic gas supply system
• Retort to improve the gastightness and to protect the furnace chamber against contamination

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 controlled manually or automatically for better ventilation of 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