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Professional Furnaces with Flap Door or Lift Door

 1  2
L 1/12 L 5/11

LT 24/11

Over-temperature limiter

L 5/11 with gas supply system

Adjustable air inlet integrated in the door

L 1/12 - LT 40/12

Our L 1/12 - LT 40/12 product line is 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 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 models L 24/11 - LT 40/12)
  • Ceramic heating plates with integral heating element which is safeguarded against fumes and splashing, and easy to replace
  • Highly durable cured vacuum fiber module lining
  • 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

Additional equipment

  • Chimney, chimney with fan or catalytic converter (not for L 1)
  • Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the oven and load
  • Protective gas connection to purge with non-flammable protective or reaction gases
  • Manual or automatic gas supply system
  • Process control and documentation with Controltherm MV software package

 

Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Connected Electrical Weight Minutes
Flap door °C w d h in l W D H load kW connection* in kg to Tmax²
L 3/11 1100 160 140 100 3 380 370 420 1.2 1-phase 20 60
L 5/11 1100 200 170 130 5 440 470 520 2.4 1-phase 35 60
L 9/11 1100 230 240 170 9 480 550 570 3.0 1-phase 45 75
L 15/11 1100 230 340 170 15 480 650 570 3.5 1-phase 55 90
L 24/11 1100 280 340 250 24 560 660 650 4.5 3-phase 75 95
L 40/11 1100 320 490 250 40 600 790 650 6.0 3-phase 95 95
                         
L 1/12 1200 90 115 110 1 250 265 340 1.5 1-phase 10 25
L 3/12 1200 160 140 100 3 380 370 420 1.2 1-phase 20 75
L 5/12 1200 200 170 130 5 440 470 520 2.4 1-phase 35 75
L 9/12 1200 230 240 170 9 480 550 570 3.0 1-phase 45 90
L 15/12 1200 230 340 170 15 480 650 570 3.5 1-phase 55 105
L 24/12 1200 280 340 250 24 560 660 650 4.5 3-phase 75 110
L 40/12 1200 320 490 250 40 600 790 650 6.0 3-phase 95 110

 

Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Connected Electrical Weight Minutes
Lift door °C w d h in l W D load kW connection* in kg to Tmax²
LT 3/11 1100 160 140 100 3 380 370 420+165 1.2 1-phase 20 60
LT 5/11 1100 200 170 130 5 440 470 520+220 2.4 1-phase 35 60
LT 9/11 1100 230 240 170 9 480 550 570+290 3.0 1-phase 45 75
LT 15/11 1100 230 340 170 15 480 650 570+290 3.5 1-phase 55 90
LT 24/11 1100 280 340 250 24 560 660 650+335 4.5 3-phase 75 95
LT 40/11 1100 320 490 250 40 600 790 650+335 6.0 3-phase 95 95
                         
LT 3/12 1200 160 140 100 3 380 370 420+165 1.2 1-phase 20 75
LT 5/12 1200 200 170 130 5 440 470 520+220 2.4 1-phase 35 75
LT 9/12 1200 230 240 170 9 480 550 570+290 3.0 1-phase 45 90
LT 15/12 1200 230 340 170 15 480 650 570+290 3.5 1-phase 55 105
LT 24/12 1200 280 340 250 24 560 660 650+335 4.5 3-phase 75 110
LT 40/12 1200 320 490 250 40 600 790 650+335 6.0 3-phase 95 110
¹Including opened lift door *Please see page 60 for more information about supply voltage
²If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE

  

Compact Muffle Furnaces

 3  4  5
LE 1/11 LE 6/11 LE 4/11

Over-temperature limiter

LE 1/11 - LE 14/11

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
  • Multi-layer insulation with fiber plates in the furnace chamber
  • 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 in side space (under the door on the LE 1/11, LE 2/11 and LE 4/11 to save space)

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
  • Process control and documentation with Controltherm MV software package
Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Connected Electrical Weight Minutes
  °C w d h in l W D H load kW connection* in kg to Tmax¹
LE 1/11 1100 90 115 110 1 250 265 340 1.5 1-phase 10 10
LE 2/11 1100 110 180 110 2 275 380 350 1.8 1-phase 10 25
LE 4/11 1100 170 200 170 4 335 400 410 1.8 1-phase 15 35
LE 6/11 1100 170 200 170 6 510 400 320 1.8 1-phase 18 35
LE 14/11 1100 220 300 220 14 555 500 370 2.9 1-phase 25 40
¹If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE *Please see page 60 for more information about supply voltage

 

 Muffle Furnaces with Brick Insulation and Flap Door or Lift Door

 6  7
LT 15/13 L 9/13

Furnace lining with high-quality lightweight refractory brick insulation

Over-temperature limiter

L 5/13 - LT 15/13

Heating elements on support tubes radiating freely into the furnace chamber provide for particularly short heating times for these models. Thanks to their robust lightweight refractory brick insulation, they can reach a maximum working temperature of 1300 °C. These models 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 from heating elements
  • 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

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

  

Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Connected Electrical Weight Minutes
  °C w d h in l W D H load kW connection* in kg to Tmax²
L, LT 5/13 1300 200 170 130 5 440 470 520+2201 2.4 1-phase 42 45
L, LT 9/13 1300 230 240 170 9 480 550 570+2901 3.0 1-phase 60 50
L, LT 15/13 1300 230 340 170 15 480 650 570+2901 3.5 1-phase 70 60
¹Including opened lift door (LT models) *Please see page 60 for more information about supply voltage
²If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE

  

Muffle Furnaces with Embedded Heating Elements in the Ceramic Muffle

 8
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, piped and ready to connect

Over-temperature limiter

L, LT 9/11/SKM

We particularly recommend the L 9/11/SKM model if your application involves aggressive substances. The furnace has a ceramic muffle with embedded heating from four sides. The 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
  • 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

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
Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Connected Electrical Weight Minutes
  °C w d h in l W D H load kW connection* in kg to Tmax²
L 9/11/SKM 1100 230 240 170 9 480 550 570 3.0 1-phase 50 90
LT 9/11/SKM 1100 230 240 170 9 480 550 570+290¹ 3.0 1-phase 50 90
¹Including opened lift door *Please see page 60 for more information about supply voltage
²If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE

 

 Furnace Systems with Scale and Software for Determination of Combustion Loss

 9
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

L 9/11/SW - LT 9/12/SW

This complete system, with an furnace, 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 by ceramic heating plates
  • Ceramic heating plates with integral heating element which is safeguarded against fumes and splashing, and easy to replace
  • Highly durable cured vacuum fiber module lining
  • 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
  • Software for documentation of the temperature curve and combustion loss using a PC

Additional equipment

  • Chimney, chimney with fan or catalytic converter
  • Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the oven and load
  • Process control and documentation with Controltherm MV software package
Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Connected Electrical Weight Minutes
flap door °C w d h in l W D H load kW connection* in kg to Tmax²
L 9/11/SW 1100 230 240 170 9 480 550 800 3.0 1-phase 55 75
L 9/12/SW 1200 230 240 170 9 480 550 800 3.0 1-phase 55 90

 

Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Connected Electrical Weight Minutes
Lift door °C w d h in l W D load kW connection* in kg to Tmax²
LT 9/11/SW 1100 230 240 170 9 480 550 800+290 3.0 1-phase 55 75
LT 9/12/SW 1200 230 240 170 9 480 550 800+290 3.0 1-phase 55 90
¹Including opened lift door *Please see page 60 for more information about supply voltage
²If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE

 

Scale Readability Weight range Weight of plunger

Calibration value

In g

Minimum load
type in g in g in g   in g
EW-2200 0,01 2200 incl. plunger 850 0,1 0,5
EW-4200 0,01 4200 incl. plunger 850 0,1 0,5
EW-6200 0,01 6200 incl. plunger 850 - 1,0
EW-12000 0,10 12000 incl. plunger 850 1,0 5,0

  

Exhaust Systems/Accessories

 

 10  11  12
Chimney for connection to an exhaust pipe. Chimney with fan, to remove exhaust gas from the furnace better. The P 330 controller can be used to activate the fan automatically (not for model L(T)15..).* 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 P 330 controller can be used to switch the catalytic converter automatically (not for model L(T)15..).*
 13  14  15
Exhaust torch to burn exhaust gases which are generated during the process. The torch is gas heated and will be operated with propane gas. If a catalytic afterburner cannot be used for the process this torch is recommended. 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. Square saggar for furnaces HTC 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.

 

 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 models Ceramic ribbed plate Ceramic collecting pan Steel collecting pan (Material 1.4828)
  Articel No. Dimensions in mm Articel No. Dimensions in mm Articel No. Dimensions in mm
L 1, LE 1 691601835 110 x 90 x 12.7 - - 691404623 85 x 100 x 20
LE 2 691601097 170 x 110 x 12.7 691601099 100 x 160 x 10 691402096 110 x 170 x 20
L 3, LT 3, LV 3, LVT 3 691600507 150 x 140 x 12.7 691600510 150 x 140 x 20 691400145 150 x 140 x 20
LE 4, LE 6, L 5, LT 5, LV 5, LVT 5 691600508 190 x 170 x 12.7 691600511 190 x 170 x 20 691400146 190 x 170 x 20
L 9, LT 9, LV 9, LVT 9, N 7 691600509 240 x 220 x 12.7 691600512 240 x 220 x 20 691400147 240 x 220 x 20
LE 14 691601098 210 x 290 x 12.7 - - 691402097 210 x 290 x 20
L 15, LT 15, LV 15, LVT 15, N 11 691600506 340 x 220 x 12.7 - - 691400149 230 x 330 x 20
L 24, LT 24 691600874 340 x 270 x 12.7 - - 691400626 270 x 340 x 20
L 40, LT 40 691600875 490 x 310 x 12.7 - - 691400627 310 x 490 x 20

  

High-Temperature Chamber Furnaces with SiC Rod Heating

 17  18
HTC 08/15 HTCT 01/16

Furnace chamber with high-quality fiber materials and SiC heating rods on both sides of the furnace

Saggars with top lid

Over-temperature limiter

HTCT 03/14 - HTCT 08/16

These powerful laboratory muffle furnaces are available for temperatures up to 1400 °C, 1500 °C, 1550 °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, 1550  °C or 1600 °C
  • Working Temperature 1500 °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 01/16 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 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
  • 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
Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Connected Electrical Weight Minutes
  °C w d h in l W D load kW connection* in kg to Tmax³
HTC, HTCT 03/14 1400 120 210 120 3.0 400 535 530 9.0 3-phase¹ 30 40
HTC, HTCT 08/14 1400 170 290 170 8.0 450 620 570 13.0 3-phase 40 40
                         
HTC, HTCT 03/15 1500 120 210 120 3.0 400 535 530 9.0 3-phase¹ 30 50
HTC, HTCT 08/15 1500 170 290 170 8.0 450 620 570 13.0 3-phase 40 50
                         
HTCT 01/16 1550 110 120 120 1.5 340 300 460 3.5 1-phase 18 40
HTC, HTCT 03/16 1600 120 210 120 3.0 400 535 530 9.0 3-phase¹ 30 60
HTC, HTCT 08/16 1600 170 290 170 8.0 450 620 570 13.0 3-phase 40 60
¹Heating only between two phases *Please see page 60 for more information about supply voltage
²Plus maximum 270 mm for models HTCT when open³If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE

  

High-Temperature Furnaces with Scale for Determination of Combustion Loss and Thermogravimetric Analysis (TGA)

 19
LHT 04/16 SW with scale for measuring weight reduction during annealing and with gas supply system

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

LHT 04/16 SW and LHT 04/17 SW

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
Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Connected Electrical Weight Minutes
  °C w d h in l W D H load kW connection* in kg to Tmax²
LHT 04/16 SW 1600 150 150 150 4 655 370 890 5.0 3-phase¹ 85 25
LHT 04/17 SW 1750 150 150 150 4 655 370 890 5.0 3-phase¹ 85 40
¹Heating only between two phases *Please see page 60 for more information about supply voltage
²If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE