Muffle Furnaces with Flap Door or Lift Door (1100/1200°C)

L 5/11 Furnace with Flap Door

LT 5/12 Furnace with Lift Door

The NABERTHERM 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

Model	Tmax	Inner dimensions in mm			Volume	Outer dimensions3 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	385	330	405	1.2	1-phase	20	60
L 5/11	1100	200	170	130	5	385	390	460	2.4	1-phase	30	60
L 9/11	1100	230	240	170	9	415	455	515	3	1-phase	35	75
L 15/11	1100	230	340	170	15	415	555	515	3.5	1-phase	40	95
L 24/11	1100	280	340	250	24	490	555	580	4.5	3-phase	55	95
L 40/11	1100	320	490	250	40	530	705	580	6	3-phase	65	95

L 1/12	1200	90	115	110	1	290	280	430	1.5	1-phase	10	25
L 3/12	1200	160	140	100	3	385	330	405	1.2	1-phase	20	75
L 5/12	1200	200	170	130	5	385	390	460	2.4	1-phase	30	75
L 9/12	1200	230	240	170	9	415	455	515	3	1-phase	35	90
L 15/12	1200	230	340	170	15	415	555	515	3.5	1-phase	40	110
L 24/12	1200	280	340	250	24	490	555	580	4.5	3-phase	55	110
L 40/12	1200	320	490	250	40	530	705	580	6	3-phase	65	110

Model	Tmax	Inner dimensions in mm			Volume	Outer dimensions3 in mm			Connected	Electrical	Weight	Minutes
Lift door	°C	w	d	h	in L	W	D	H1	load kW	connection*	in kg	to Tmax2
LT 3/11	1100	160	140	100	3	385	330	405+155	1.2	1-phase	20	60
LT 5/11	1100	200	170	130	5	385	390	460+205	2.4	1-phase	30	60
LT 9/11	1100	230	240	170	9	415	455	515+240	3	1-phase	35	75
LT 15/11	1100	230	340	170	15	415	555	515+240	3.5	1-phase	40	95
LT 24/11	1100	280	340	250	24	490	555	580+320	4.5	3-phase	55	95
LT 40/11	1100	320	490	250	40	530	705	580+320	6	3-phase	65	95

LT 3/12	1200	160	140	100	3	385	330	405+155	1.2	1-phase	20	75
LT 5/12	1200	200	170	130	5	385	390	460+205	2.4	1-phase	30	75
LT 9/12	1200	230	240	170	9	415	455	515+240	3	1-phase	35	90
LT 15/12	1200	230	340	170	15	415	555	515+240	3.5	1-phase	40	110
LT 24/12	1200	280	340	250	24	490	555	580+320	4.5	3-phase	55	110
LT 40/12	1200	320	490	250	40	530	705	580+320	6	3-phase	65	110
1: Including opened lift door
2: If connected at 230 V 1/N/PE rsp. 400 V 3/N/PE
3: External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.