เตาเผาไฟฟ้า Furnace

Muffle Furnaces up to 1100 °C or 1200 °C

The muffle furnaces L 1/12 - LT 40/12 have been proven 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.

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 40/12) for an optimal temperature uniformity see page 71 · Thermocouple type N (1100 °C) or type S (1200 °C) · Ceramic heating plates with integral heating element which is safeguarded and easy to replace · 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 · Controller B510 resp. R7 for L 1/12 (5 programs with each 4 segments), alternative controllers.

Additional Equipment · Chimney, chimney with fan or catalytic converter (not for L 1 and L 15) · Over-temperature limiter with adjustable cutout temperature as temperature limiter to protect the oven 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) not gas tight · Manual or automatic gas supply system · Port for thermocouple in the rear wall or in the furnace door · Charging rack with closed or perforated trays for loading the furnace in two levels incl. holder for inserting/removing the trays up to a max. temperature of 800°C and a max. loading weight of 2 kg for the L(T) 9/11 respectively 3 kg for the L(T) 15/11 ·.

Model Tmax Inner dimensions in mm Volume Outer dimensions2 in mm Temperature uniformity of +/− 5K in the empty workspace 5 Connected load Electrical Weight Heating time in °C1 w d h in l W D H3 w d h in kW connection* in kg in min4 L(T) 3/11 1100 160 140 100 3 385 330 405+155 110 50 50 1.2 1-phase 20 40 L(T) 5/11 1100 200 170 130 5 385 390 460+205 170 80 90 2.4 1-phase 30 50 L(T) 9/11 1100 230 240 170 9 415 455 515+240 180 150 120 3.0 1-phase 35 65 L(T) 15/11 1100 230 340 170 15 415 555 515+240 180 250 120 3.2 1-phase 40 75 L(T) 24/11 1100 280 340 250 24 490 555 580+320 230 250 200 4.5 3-phase 55 70 L(T) 40/11 1100 320 490 250 40 530 705 580+320 270 400 200 6.0 3-phase 65 75 L 1/12 1200 90 115 110 1 290 280 430 45 60 40 1.5 1-phase 10 25 L(T) 3/12 1200 160 140 100 3 385 330 405+155 110 50 50 1.2 1-phase 20 45 L(T) 5/12 1200 200 170 130 5 385 390 460+205 170 80 90 2.4 1-phase 30 60 L(T) 9/12 1200 230 240 170 9 415 455 515+240 180 150 120 3.0 1-phase 35 75 L(T) 15/12 1200 230 340 170 15 415 555 515+240 180 250 120 3.2 1-phase 40 85 L(T) 24/12 1200 280 340 250 24 490 555 580+320 230 250 200 4.5 3-phase 55 80 L(T) 40/12 1200 320 490 250 40 530 705 580+320 270 400 200 6.0 3-phase 65 85 1 Recommended working temperature for processes with longer dwell times is 1000 °C (L../11) rsp. 1100 °C (L../12) *Please see page 75 for more information about supply voltage 2 External dimensions vary when furnace is equipped with additional equipment. Dimensions on request. 3 Including opened lift door (LT models) 4 Heating time of the empty and closed furnace up to Tmax −100 K (connected to 230 V 1/N/PE rsp. 400 V 3/N/PE) 5 Temperature uniformity of +/− 5 K with closed fresh-air inlet in empty work space according to DIN 17052-1 at working temperatures above 800 °C.