Nabertherm Muffle Furnace L 40/11/B510, 40 l, Tmax 1,100 °C, Flap Door, L-405K1DL

The Nabertherm L 40/11 offers 40 litres of usable space and runs with Tmax 1,100 °C. Like all sizes from the L 24/11 upwards, it heats from three sides instead of two, the connection is three phase with 6.5 kW.

Construction, heating and insulation

Inside, the usable space measures 320 x 490 x 250 mm, externally 530 x 705 x 580 mm, for the lift door version LT 40/11, 320 mm are added when the door is open. The housing is double walled, rear ventilated and made of textured stainless steel sheet. From size L 24/11 up to LT 60/12, the L/LT series heats from three sides via ceramic heating plates with integrated heating wire, also for the L 40/11. The furnace is insulated exclusively with material without classification under the CLP Regulation (EG) Nr. 1272/2008, without aluminium silicate wool (RCF fibre). The empty, closed furnace needs around 80 minutes at 230 V 1/N/PE or 400 V 3/N/PE to reach Tmax minus 100 K, the weight is 70 kg.

Controller and three phase connection

Control is via the touch controller B510 with 5 programs of 4 segments each, process data can be saved with NTLog Basic on a USB stick. The heating runs quietly via solid state relays. Unlike the sizes up to 15 litres, the L 40/11 needs a three phase connection with 6.5 kW. At Tmax 1,100 °C, a type N thermocouple is installed, the temperature uniformity at working temperatures above 800 °C in the empty usable space with the air inlet slide closed is +/-5 K according to DIN 17052-1.

Flap door and safety

The flap door can be used as a shelf during loading, an adjustable air inlet opening sits in the door, the exhaust air is drawn off via the rear wall. For additional over-temperature protection, an adjustable temperature limiter with adjustable cut-off temperature can be ordered as an option.

Selection guide for volume and connection type

If a smaller usable space with a single phase connection is sufficient, the L 15/11 (article no. L-155K1AL) offers 15 litres with two sided heating. More usable space is offered by the L 60/11 with 60 litres, between the L 15/11 and L 40/11 lies the L 24/11 with 24 litres, both on request.

Typical applications

The L/LT series is intended for use in laboratory and research. With 40 litres of usable space and a three phase connection, the L 40/11 is aimed at larger sample quantities at temperatures up to 1,100 °C than the single phase sizes up to 15 litres allow.

• Larger sample quantities up to 1,100 °C
• Laboratory workstations with three phase connection

Technical details

Other models in the series

The table shows all models in the L/LT series with Tmax 1,100 °C and flap door, sorted by usable volume:

Scope of delivery

• 1x Nabertherm muffle furnace L 40/11 with controller B510

Regulatory information

The device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer Nabertherm GmbH is DE 31598342. Information on the return of old appliances can be found on our Environment and disposal page.

Individual requirements and procurement service

Additional factory options for the L 40/11 include an exhaust chimney, optionally with fan or catalytic converter, an adjustable temperature limiter with adjustable cut-off temperature, a protective gas connection for purging with non-flammable process gases, a manual or automatic gas supply system, a thermocouple feedthrough in the rear wall or furnace door, the VCD software package for process control and documentation, and a charging frame with multiple loading levels, usable up to 800 °C with 2 to 3.5 kg per level depending on the model. Which option suits best is clarified by LT Laborhandel in a personal consultation.