Muffle Furnaces with Flap Door or Lift 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.

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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.

Features

  • 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.

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.

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.

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.

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.

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.

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.

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.

This weighing furnace with integrated precision scale and software, was designed especially for combustion loss determination in the laboratory. 

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