Laboratory oven L(T) 3/11

mufflestainless steelventilated

Product overview
The muffle furnaces L 3/11 - LT 60/12 are designed for daily laboratory use. These models stand out for their workmanship, advanced design and high reliability. The muffle furnaces are delivered with either a flap door (L) or a lift door (LT) at no extra charge.

Standard Equipment

• 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 60/12) for optimal temperature uniformity
• Temperature uniformity of ±5 K with closed fresh-air inlet in empty workspace (according to DIN 17052-1) at working temperatures above 800 °C
• Thermocouple type N (for 1100 °C) or type S (for 1200 °C)
• Ceramic heating plates with integral heating element; elements are protected and easy to replace
• Optional flap door (L) usable as work platform or lift door (LT) with hot surface facing away from the operator
• Dual-shell ventilated housing made of textured stainless steel sheets for low surface temperature and stability
• Exclusive use of insulation materials that are not classified under EC Regulation No. 1272/2008 (no use of classified refractory ceramic fiber / RCF)
• Adjustable air inlet integrated in door
• Exhaust air outlet in the rear wall of the furnace
• Controller with touch operation: series controller option B510 (5 programs with 4 segments) or controller R8 for single-temperature models (L 1/12)
• Solid state relays for low-noise operation
• Defined application within the constraints of the operating instructions
• NTLog Basic for Nabertherm controller: process data recording via USB flash drive

Additional equipment

• Chimney, chimney with fan or catalytic converter (not for L 1 and L 15)
• Over-temperature limiter with adjustable cutout temperature to protect furnace and load
• Protective gas connection for purging with non-flammable process gases (not available in combination with chimney/chimney with fan or catalytic converter) — not gas-tight
• Manual or automatic gas supply system
• Port for thermocouple in rear wall or furnace door
• Process control and documentation via VCD software package for monitoring, documentation and control
• Charging rack with closed or perforated trays for loading furnace in two levels (holders for insertion/removal up to max. 800 °C). Max loading weight per layer: 2 kg for L(T) 9/11, 3 kg for L(T) 15/11, 3.5 kg for L(T) 24/11 and L(T) 40/11

Technical specifications (selected models — table)
Columns: Model; Tmax (°C); Inner W x D x H (mm); Volume (l); Outer W x D x H (mm); Connected load (kW); Electrical connection; Weight (kg); Heating time (min)
L(T) 3/11; 1100; 160 x 140 x 100; 3; 385 x 330 x 405+155; 1.3; 1-phase; 21; 41
L(T) 5/11; 1100; 205 x 170 x 130; 5; 385 x 390 x 460+205; 2.6; 1-phase; 27; 47
L(T) 9/11; 1100; 235 x 240 x 170; 9; 415 x 455 x 515+240; 3.3; 1-phase; 35; 63
L(T) 15/11; 1100; 230 x 340 x 170; 15; 415 x 555 x 515+240; 3.5; 1-phase; 43; 74
L(T) 24/11; 1100; 280 x 340 x 250; 24; 490 x 555 x 580+320; 4.9; 3-phase; 52; 69
L(T) 40/11; 1100; 320 x 490 x 250; 40; 530 x 705 x 580+320; 6.5; 3-phase; 70; 80
LT 60/11; 1100; 380 x 490 x 330; 60; 610 x 705 x 660+385; 9.8; 3-phase; 83; 150
L 1/12; 1200; 90 x 115 x 110; 1; 290 x 280 x 410; 1.6; 1-phase; 15; 25
L(T) 3/12; 1200; 160 x 140 x 100; 3; 385 x 330 x 405+155; 1.3; 1-phase; 21; 48
L(T) 5/12; 1200; 205 x 170 x 130; 5; 385 x 390 x 460+205; 2.6; 1-phase; 27; 59
L(T) 9/12; 1200; 235 x 240 x 170; 9; 415 x 455 x 515+240; 3.3; 1-phase; 35; 78
L(T) 15/12; 1200; 230 x 340 x 170; 15; 415 x 555 x 515+240; 3.5; 1-phase; 43; 99
L(T) 24/12; 1200; 280 x 340 x 250; 24; 490 x 555 x 580+320; 4.9; 3-phase; 52; 82
L(T) 40/12; 1200; 320 x 490 x 250; 40; 530 x 705 x 580+320; 6.5; 3-phase; 70; 97
Notes: Recommended working temperature for long dwells: 1000 °C (L../11) or 1100 °C (L../12). Outer dimensions may vary with additional equipment. Outer H for LT models includes opened lift door height. Heating time values correspond to heating of empty closed furnace up to Tmax −100 K (specified line voltages). Temperature uniformity ±5 K refers to empty workspace with closed fresh-air inlet at working temperatures above 800 °C (DIN 17052-1). Connected load refers to standard furnace and may increase with additional equipment.

Caractéristiques / spécifications techniques

• Max. operating temperatures: 1100 °C or 1200 °C depending on model
• Heating elements integrated in ceramic heating plates (safe, replaceable)
• Thermocouple: Type N for 1100 °C models, Type S for 1200 °C models
• Controller options: touch controller (B510) with 5 programs × 4 segments, or R8 (single temperature adjustable) for certain models
• NTLog Basic available for process data recording (USB flash drive)
• Dual-shell ventilated stainless steel housing
• Adjustable fresh-air inlet integrated in door; exhaust port at rear
• Optional accessories: chimneys (with/without fan), catalytic converter, over-temperature limiter, protective gas purge connection, gas supply systems, thermocouple ports, charging racks, process control/documentation software
• Insulation: exclusively non-classified materials (no RCF)
• Multiple sizes available (inner volumes from approx. 1 l up to 60 l and larger), single- or three-phase electrical configurations depending on model