The chamber furnace systems LH 15/12 - LH 60/12 have proven themselves for many years as professional chamber furnaces. For stress relief annealing after laser sintering, the furnaces are equipped with a protective gas box for non-flammable protective gas, e.g. argon, and an automatic gas supply system for flow rates of 4 l – 50 l/min. The design with gas supply box is a cost-effective alternative to retort furnaces and is suitable for many processes. The batch to be annealed is wrapped in annealing/hardening foil during the process to protect it from oxidation and decarburization. To protect the bottom insulation of the furnace from mechanical stress, a charging plate is required when using a gas supply box. 

• Tmax 1200 °C
• Recommended operating temperatures up to 1100 °C, at operating temperatures up to 1150 °C increased wear of the protective gas box must be expected
• High furnace chamber with five-sided heating for very good temperature uniformity
• Heating elements on support tubes ensure free heat radiation and a long service life
• Controller mounted on furnace door and removable for comfortable operation
• Protection of bottom heating and flat stacking surface provided by embedded SiC plate in the floor
• Dual shell housing made of textured stainless steel sheets with additional fan cooling for low surface temperature
• Multi-layered insulation of light refractory bricks and special backup insulation
• Exclusive use of insulation materials without categorization according to EC Regulation No 1272/2008 (CLP). This explicitly means that alumino silicate wool, also known as “refractory ceramic fiber” (RCF), which is classified and possibly carcinogenic, is not used.
• Motorized exhaust air flap
• Adjustable air inlet in furnace floor
• Base included
• Protective gas boxes for inert gas atmosphere with additional thermocouple, type K
• Automatic gas supply system for flow rates of 4 l – 50 l/min
• Charge control for measuring the temperature directly at the load in the gas supply box
• Charging plate and annealing and hardening foils
• Controller with touch operation P570 (50 programs with each 40 segments)
• MyNabertherm App for online monitoring of the firing on mobile devices for free download
• Freeware NTEdit for convenient program input via MS Excel on the PC
• Freeware NTGraph for evaluation and documentation of firings using MS Excel on the PC
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive
• Defined application within the constraints of the operating instructions