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Muffle Furnaces with Flap Door or Lift Door

Muffle furnace L 3/12 Muffle furnace L 5/11

Muffle furnace LT 5/12

Muffle furnace L 3/11

Observation hole in the door as additional equipment

Over-temperature limiter

Gas supply system for non-flammable protective or reactive gas with shutoff valve and flow meter with regulator valve, optionally with magnetic valve

Adjustable air inlet integrated in the door

The muffle furnaces L 1/12 - LT 40/12 are the right choice for daily laboratory use. These models stand out for their excellent workmanship, advanced and attractive design, and high level of reliability. The muffle furnaces come equipped with either a flap door or lift door at no extra charge.

  • Tmax 1100 °C or 1200 °C
  • Heating from two sides by ceramic heating plates (heating from three sides for muffle furnaces L 24/11 - LT 40/12)
  • Ceramic heating plates with integral heating element which is safeguarded against fumes and splashing, and easy to replace
  • Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
  • Housing made of sheets of textured stainless steel
  • Dual shell housing for low external temperatures and high stability
  • Optional flap door (L) which can be used as work platform or lift door (LT) with hot surface facing away from the operator
  • Adjustable air inlet integrated in door (see illustration)
  • Exhaust air outlet in rear wall of furnace
  • Solid state relays provide for low-noise operation
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

  • Chimney, chimney with fan or catalytic converter (not for L 1)
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Protective gas connection to purge with non-flammable protective or reaction gases (not available in combination with chimney, chimney with fan or catalytic converter)
  • Observation hole in the door
  • Manual or automatic gas supply system
  • Process control and documentation via VCD software package for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions3 in mmConnectedElectricalWeightMinutes
Flap door°Cwdhin lWDHload kWconnection*in kgto Tmax2
L 3/11110016014010033853304051.21-phase2060
L 5/11110020017013053853904602.41-phase3060
L 9/11110023024017094154555153.01-phase3575
L 15/111100230340170154155555153.51-phase4095
L 24/111100280340250244905555804.53-phase5595
L 40/111100320490250405307055806.03-phase6595
             
L 1/1212009011511012902804301.51-phase1025
L 3/12120016014010033853304051.21-phase2075
L 5/12120020017013053853904602.41-phase3075
L 9/12120023024017094154555153.01-phase3590
L 15/121200230340170154155555153.51-phase40110
L 24/121200280340250244905555804.53-phase55110
L 40/121200320490250405307055806.03-phase65110
ModelTmaxInner dimensions in mmVolumeOuter dimensions3 in mmConnectedElectricalWeightMinutes
Lift door°Cwdhin lWDH1load kWconnection*in kgto Tmax2
LT 3/1111001601401003385330405+1551.21-phase2060
LT 5/1111002001701305385390460+2052.41-phase3060
LT 9/1111002302401709415455515+2403.01-phase3575
LT 15/11110023034017015415555515+2403.51-phase4095
LT 24/11110028034025024490555580+3204.53-phase5595
LT 40/11110032049025040530705580+3206.03-phase6595
             
LT 3/1212001601401003385330405+1551.21-phase2075
LT 5/1212002001701305385390460+2052.41-phase3075
LT 9/1212002302401709415455515+2403.01-phase3590
LT 15/12120023034017015415555515+2403.51-phase40110
LT 24/12120028034025024490555580+3204.53-phase55110
LT 40/12120032049025040530705580+3206.03-phase65110
1Including opened lift door *Please see page 73 for more information about supply voltage
2If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE
3External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
 

Muffle Furnaces Basic Models

Muffle furnace LE 1/11 Muffle furnace LE 6/11

Over-temperature limiter

With their unbeatable price/performance ratio, these compact muffle furnaces are perfect for many applications in the laboratory. Quality features like the dual shell furnace housing of rust-free stainless steel, their compact, lightweight constructions, or the heating elements encased in quartz glass tubes make these models reliable partners for your application.

  • Tmax 1100 °C, working temperature 1050 °C
  • Heating from two sides from heating elements in quartz glass tubes
  • Maintenance-friendly replacement of heating elements and insulation
  • Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
  • Housing made of sheets of textured stainless steel
  • Dual shell housing for low external temperatures and high stability
  • Flap door which can also be used as a work platform
  • Exhaust air outlet in rear wall
  • Solid state relays provide for low-noise operation
  • Compact dimensions and light weight
  • Controller mounted under the door to save space
  • Defined application within the constraints of the operating instructions

Additional equipment

  • Chimney, chimney with fan or catalytic converter (not for L 1)
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Protective gas connection to purge with non-flammable protective or reaction gases
  • Manual gas supply system
  • Observation hole in the door
ModelTmaxInner dimensions in mmVolumeOuter dimensions2 in mmConnectedElectricalWeightMinutes
 °Cwdhin lWDHload kWconnection*in kgto Tmax1
LE 1/1111009011511012902804301.51-phase1010
LE 2/11110011018011023303854301.81-phase1025
LE 6/11110017020017063904354901.81-phase1835
LE 14/111100220300220144405355402.91-phase2540
1If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE *Please see page 73 for more information about supply voltage
2External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
 

Muffle Furnaces with Brick Insulation and Flap Door or Lift Door

Muffle furnace LT 5/13 Muffle furnace L 9/13

Furnace lining with high-quality lightweight refractory brick insulation

Over-temperature limiter

Heating elements on support tubes radiating freely into the furnace chamber provide for particularly short heating times for these muffle furnaces. Thanks to their robust lightweight refractory brick insulation, they can reach a maximum working temperature of 1300 °C. These muffle furnaces thus represent an interesting alternative to the familiar L(T) 3/11 models, when you need particularly short heating times or a higher application temperature.

  • Tmax 1300 °C
  • Heating from two sides
  • Heating elements on support tubes ensure free heat radiation and a long service life
  • Multi-layer insulation with robust lightweight refractory bricks in the furnace chamber
  • Housing made of sheets of textured stainless steel
  • Dual shell housing for low external temperatures and stability
  • Optional flap door (L) which can be used as work platform or lift door (LT) with hot surface facing away from the operator
  • Adjustable air inlet in the furnace door
  • Exhaust air outlet in rear wall of furnace
  • Solid state relays provide for low-noise operation
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

  • Chimney, chimney with fan or catalytic converter
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Protective gas connection to purge with non-flammable protective or reaction gases
  • Manual or automatic gas supply system
  • Observation hole in the door
  • Process control and documentation via VCD software package for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions3 in mmConnectedElectricalWeightMinutes
 °Cwdhin lWDH1load kWconnection*in kgto Tmax2
L, LT 5/1313002001701305490450580+3202.41-phase4245
L, LT 9/1313002302401709530525630+3503.01-phase6050
L, LT 15/13130026034017015530625630+3503.51-phase7060
1Including opened lift door (LT models) *Please see page 73 for more information about supply voltage
2If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE
3External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
 

Muffle Furnaces up to 1400 °C

Muffle furnace L 9/14 Muffle furnace L 15/14

Over-temperature limiter

Gas supply system for non-flammable protective or reactive gas with shutoff valve and flow meter with regulator valve, optionally with magnetic valve

These models stand out for their excellent workmanship, advanced and attractive design, and high level of reliability. Heating elements on support tubes radiating freely into the furnace chamber provide for particularly short heating times and a maximum temperature of 1400 °C. These muffle furnaces are a good alternative to the familiar L(T) ../11 series when higher application temperatures are needed.

  • Tmax 1400 °C
  • Heating from two sides
  • Heating elements on support tubes ensure free heat radiation and a long service life
  • Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
  • Dual shell housing for low external temperatures and high stability
  • Adjustable air inlet integrated in door
  • Exhaust air outlet in rear wall of furnace
  • Solid state relays provide for low-noise operation
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

  • Chimney, chimney with fan or catalytic converter
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Protective gas connection to purge with non-flammable protective or reaction gases (not available in combination with chimney, chimney with fan or catalytic converter)
  • Manual or automatic gas supply system
  • Process control and documentation via VCD software package for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions4 in mmConnectedElectricalWeightMinutes
 °C2wdhin lWDH1load kWconnection*in kgto Tmax3
L, LT 5/1414002001701305490450580+3202.51-phase3855
L, LT 9/1414002302401709530525630+3503.01-phase5560
L, LT 15/14140026034017015530625360+3503.51-phase6570
1Including opened lift door*Please see page 73 for more information about supply voltage
2Recommended working temperature for processes with longer dwell times is 1300 °C
3If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE
4External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
 

Muffle Furnaces with Embedded Heating Elements in the Ceramic Muffle

L 9/11/SKM

Muffle heated from four sides

Gas supply system for non-flammable protective or reactive gas with shutoff valve and flow meter with regulator valve, optionally with magnetic valve

Over-temperature limiter

We particularly recommend the muffle furnace L 9/11/SKM if your application involves aggressive substances. The furnace has a ceramic muffle with embedded heating from four sides. The muffle furnace thus combines a very good temperature uniformity with excellent protection of the heating elements from aggressive atmospheres. Another aspect is the smooth, nearly particle free muffle (furnace door made of fiber insulation), an important quality feature for some ashing processes.

  • Tmax 1100 °C
  • Muffle heated from four sides
  • Furnace chamber with embedded ceramic muffle, high resistance to aggressive gasses and vapours
  • Dual shell housing made of sheets of textured stainless steel
  • Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
  • Optional flap door (L) which can be used as work platform or lift door (LT) with hot surface facing away from the operator
  • Adjustable working air inlet in the door
  • Exhaust air outlet in rear wall of furnace
  • Solid state relays provide for low­noise operation
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

  • Chimney, chimney with fan or catalytic converter
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Protective gas connection to purge with non-flammable protective or reaction gases
  • Manual or automation gas supply system
  • Observation hole in the door
  • Process control and documentation via VCD software package for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions3 in mmConnectedElectricalWeightMinutes
 °Cwdhin lWDHload kWconnection*in kgto Tmax2
L 9/11/SKM110023024017094905055803.41-phase5090
LT 9/11/SKM11002302401709490505580+32013.41-phase5090
1Including opened lift door *Please see page 73 for more information about supply voltage
2If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE
3External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
 

Ashing Furnaces with Flap Door or Lift Door

Ashing furnace LV 3/11 Ashing furnace LVT 9/11

Air inlet and exhaust flow principle in ashing furnaces

Observation hole in the door as additional equipment

Over-temperature limiter

The ashing furnaces LV 3/11 - LVT 15/11 are especially designed for ashing in the laboratory. A special air intake and exhaust system allows air exchange of more than 6 times per minute. Incoming air is preheated to ensure a good temperature uniformity.

  • Tmax 1100 °C
  • Heating from two sides
  • Ceramic heating plates with integral heating element which is safeguarded against fumes and splashing, and easy to replace
  • Air exchange of more than 6 times per minute
  • Good temperature uniformity due to preheating of incoming air
  • Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
  • Housing made of sheets of textured stainless steel
  • Dual shell housing for low external temperatures and stability
  • Optional flap door (LV) which can be used as work platform or lift door (LVT) with hot surface facing away from the operator
  • Solid state relays provide for low­noise operation
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Observation hole in the door
  • Process control and documentation via VCD software package for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions3 in mmConnectedElectricalWeightMinutes
Flap door°Cwdhin lWDH1load kWconnection*in kgto Tmax2
LV 3/11110016014010033853607351.21-phase20120
LV 5/11110020017013053854207902.41-phase35120
LV 9/11110023024017094154858453.01-phase45120
LV 15/111100230340170154155858453.51-phase55120
ModelTmaxInner dimensions in mmVolumeOuter dimensions3 in mmConnectedElectricalWeightMinutes
Lift door°Cwdhin lWDH1load kWconnection*in kgto Tmax2
LVT 3/11110016014010033853607351.21-phase20120
LVT 5/11110020017013053854207902.41-phase35120
LVT 9/11110023024017094154858453.01-phase45120
LVT15/111100230340170154155858453.51-phase55120
1Including exhaust tube (Ø 80 mm) *Please see page 73 for more information about supply voltage
2If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE
3External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
 

Ashing Furnaces with Integrated Exhaust Gas Cleaning

Ashing furnace L 40/11 BO

The ashing furnace L ../11 BO is specially designed for processes in which larger sample quantities have to be incinerated. Fields of application are e.g. the ashing of food, thermal cleaning of injection molding tools or the determination of annealing loss. Another application is the debinding of ceramic products, e.g. after additive production.

The ashing furnaces have a passive safety system and integrated exhaust gas post combustion. An exhaust gas fan extracts flue gases from the furnace and simultaneously supplies fresh air to the furnace atmosphere with the result that sufficient oxygen is always available for the incineration process. The incoming air is guided behind the furnace heating and preheated to ensure good temperature uniformity. Exhaust gases are led from the furnace chamber to the integrated post combustion system, where they are postburned and catalytically cleaned. Directly after the incineration process (up to max. 600 °C) a subsequent process up to max. 1100 °C can take place.

  • Tmax 600 °C for the incineration process
  • Tmax 1100 °C for the subsequent process
  • Three-side heating (both sides and bottom)
  • Ceramic heating plates with embedded heating wire
  • Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
  • Dual shell housing made of structured stainless steel provides for low outer temperature and high stability
  • Steel collecting pan protects the bottom insulation
  • Spring-assisted closing of the furnace door (flap door) with mechanical locking against unintentional opening
  • Thermal/catalytic post combustion, integrated in the exhaust channel, up to 600 °C in function
  • Temperature control of post combustion can be set up to 850 °C
  • Monitored exhaust air
  • Inlet-air preheated through the bottom heating plate
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Defined application within the constraints of the operating instructions
  • NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

  • Process control and documentation via VCD software package for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions2 in mmMax. weight of hydrocarbonsMax. evaporation rateConnected loadElectricalWeight
 °Cwdhin lWDH1in gg/minkWconnection*in kg
L 9/11 BO11002302401709415575750751.07.03-phase60
L 24/11 BO1100280340250244906758001502.09.03-phase90
L 40/11 BO1100320490250405308258002002.511.53-phase110
1Including exhaust tube (Ø 80 mm)*Please see page 73 for more information about supply voltage
2External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
 

Weighing Furnace incl. Scale and Software for Determination of Combustion Loss

Weighing furnace L 9/11/SW

4 scales available for different maximum weights and scaling areas

Over-temperature limiter

Software for documentation of the temperature curve and combustion loss using a PC

This weighing furnace with integrated precision scale and software, was designed especially for combustion loss determination in the laboratory. The determination of combustion loss is necessary, for instance, when analyzing sludges and household garbage, and is also used in a variety of technical processes for the evaluation of results. The difference between the initial total mass and the combustion residue is the combustion loss. During the process, the software included records both the temperature and the weight loss.

  • Tmax 1100 °C or 1200 °C
  • Heating from two sides
  • Ceramic heating plates with integral heating element which is safeguarded against fumes and splashing, and easy to replace
  • Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
  • Dual shell housing made of sheets of textured stainless steel
  • Optional flap door (L) which can be used as work platform or lift door (LT) with hot surface facing away from the operator
  • Adjustable working air inlet in the door
  • Exhaust air outlet in rear wall of furnace
  • Solid state relays provide for low­noise operation
  • Delivery includes base, ceramic plunger with base plate in the furnace lining, precision scale and software package
  • 4 scales available for different maximum weights and scaling ranges
  • Process control and documentation for temperature and combustion loss via VCD software package for monitoring, documentation and control
  • Defined application within the constraints of the operating instructions

Additional equipment

  • Chimney, chimney with fan or catalytic converter
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
  • Observation hole in the door
ModelTmaxInner dimensions in mmVolumeOuter dimensions3 in mmConnectedElectricalWeightMinutes
flap door°Cwdhin lWDHload kWconnection*in kgto Tmax2
L 9/11/SW110023024017094154557403.01-phase5075
L 9/12/SW120023024017094154557403.01-phase5090
ModelTmaxInner dimensions in mmVolumeOuter dimensions3 in mmConnectedElectricalWeightMinutes
Lift door°Cwdhin lWDH1load kWconnection*in kgto Tmax2
LT 9/11/SW11002302401709415455740+2403.01-phase5075
LT 9/12/SW12002302401709415455740+2403.01-phase5090
1Including opened lift door *Please see page 73 for more information about supply voltage
2If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE
3External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.
ScaleReadabilityWeight rangeWeight of plungerCalibration valueMinimum load
typein gin gin gin gin g
EW-22000.012200 incl. plunger8500.10.5
EW-42000.014200 incl. plunger8500.10.5
EW-62000.016200 incl. plunger850-1.0
EW-120000.1012000 incl. plunger8501.05.0
 

Exhaust Systems/Accessories

* Note: If other controller types are used an adapter cable for connection to mains supply has to be ordered separately. The device will be activated by plugging in the socket.

   
Chimney for connection to an exhaust pipe. Chimney with fan, to remove exhaust gas from the furnace better. The B400 - P480 controllers can be used to activate the fan automatically (not for models L(T) 15.., L 1/12, LE 1/11, LE 2/11).* Catalytic converter with fan for removal of organic components from the exhaust air. Organic components are catalytically oxidized at about 600 °C, broken into carbon dioxide and water vapour. Irritating odors are thus largely eliminated. The B400 - P480 controllers can be used to switch the catalytic converter automatically (not for models L(T) 15.., L 1/12, LE 1/11, LE 2/11).*
Exhaust torch to burn exhaust gases which are generated during the process. The torch is gas-fired and will be operated with propane gas. If a catalytic post combustion cannot be used for the process this torch is recommended. Square saggar for furnaces LHTC and LHT, Tmax 1600 °C The load is placed in ceramic saggars for optimal utilization of the furnace space. Up to three saggars can be stacked on top of each other in the furnace. Each saggar has cut-outs for better ventilation. The top saggar should be closed with a lid made of ceramics also. Round saggar (Ø 115 mm) for furnaces LHT/LB, Tmax 1650 °C These saggars are perfectly suited for furnaces LHT/LB. The load is placed in the saggars. Up to three saggars can be stacked on top of each other in order to use the overall furnace chamber.
         
 

Select between different bottom plates and collecting pans for protection of the furnace and easy loading (for models L, LT, LE, LV and LVT

   
Ceramic ribbed plate, Tmax 1200 °C Ceramic collecting pan, Tmax 1300 °C Steel collecting pan, Tmax 1100 °C
         
For modelsCeramic ribbed plateCeramic collecting panSteel collecting pan (Material 1.4828)
 Articel No.Dimensions in mmArticel No.Dimensions in mmArticel No.Dimensions in mm
L 1, LE 1691601835110 x 90 x 12.7--69140462385 x 100 x 20
LE 2691601097170 x 110 x 12.7691601099100 x 160 x 10691402096110 x 170 x 20
L 3, LT 3, LV 3, LVT 3691600507150 x 140 x 12.7691600510150 x 140 x 20691400145150 x 140 x 20
LE 6, L 5, LT 5, LV 5, LVT 5691600508190 x 170 x 12.7691600511190 x 170 x 20691400146190 x 170 x 20
L 9, LT 9, LV 9, LVT 9, N 7691600509240 x 220 x 12.7691600512240 x 220 x 20691400147240 x 220 x 20
LE 14691601098210 x 290 x 12.7--691402097210 x 290 x 20
L 15, LT 15, LV 15, LVT 15, N 11691600506340 x 220 x 12.7--691400149230 x 330 x 20
L 24, LT 24691600874340 x 270 x 12.7--691400626270 x 340 x 20
L 40, LT 40691600875490 x 310 x 12.7--691400627310 x 490 x 20
 

Heat-resistant gloves for protection of the operator when loading or removing hot materials, resistant to 650 °C or 700 °C.

   
Gloves, Tmax 650 °C Gloves, Tmax 700 °C Various tongs for easy loading and unloading of the furnace