Laboratory /
Ovens and Forced Convection Furnaces up to 850 °C

Ovens up to 300 °C, also with Safety Technology According to EN 1539

Oven TR 450 Oven TR 240

Oven TR 120 LS with safety technology according to EN 1539 for charges containing liquid solvents

Oven TR 1050 with double door

Oven TR 30 with observation window

Extricable metal grids to load the oven in different layers

Electrical rotating device (in this case with tailored platform for PARR autoclave containers)

With their maximum working temperature of up to 300 °C and forced air circulation, the ovens achieve a very good temperature uniformity. They can be used for various applications such as e.g. drying, sterilizing or warm storing. Short delivery times from stock are ensured for standard models.

Standard Equipment

  • Tmax 300 °C
  • Working temperature range: + 20 °C above room temperature up to 300 °C
  • Ovens TR 30 - TR 420 designed as tabletop models
  • Ovens TR 450 - TR 1050 designed as floor standing models
  • Horizontal forced air circulation results in temperature uniformity according to DIN 17052-1 better than +/− 5 °C in the empty oven (with closed exhaust air flap)
  • Stainless steel furnace housing, material no. 1.4016 (DIN)
  • Stainless steel chamber, alloy 304 (AISI)/(DIN material no. 1.4301), rust-resistant and easy to clean
  • Charging in multiple layers possible using removeable grids (number of removeable grids included, see table to the right)
  • Large, wide-opening swing door, hinged on the right with quick release for models TR 30 - TR 240 and TR 450
  • Double swing door with quick release for models TR 420, TR 800 and TR 1050
  • Ovens TR 800 and TR 1050 equipped with transport castors
  • Infinitely adjustable exhaust at the rear wall with operation from the front
  • PID microprocessor control with self-diagnosis system
  • Models TR .. LS: Safety technology according to EN 1539 for charges containing liquid solvents, achievable temperature uniformity +/− 8 °C according to DIN 17052-1 in the empty oven (with closed exhaust air flap)
  • Controller R7 (resp. C450 for TR ..LS)

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 oven and load
  • Fan speed of the air circulation fan can be reduced infinitely
  • Window for charge observing
  • Further removeable grids with rails
  • Side inlet
  • Electrical rotary device (associated sample holder will be individually adapted to the charge)
  • Exhaust air duct DN 80
  • Transport castors for models TR 240 - TR 450
  • Upgrading available to meet the quality requirements of AMS 2750 E or FDA
ModelTmaxInner dimensions in mmVolumeOuter dimensions1 in mmConnectedElectricalWeightMinutesGrids GridsMax.
 in °Cwdhin lWDHload in kWconnection*in kgto load3
TR 30300360300300306105706652.61-phase45251480
TR 60300450390350607006107103.11-phase902514120
TR 60 LS260450360350607008207105.33-phase1002514120
TR 1203006503905001209006108603.11-phase1204527150
TR 120 LS2606503605001209008208706.33-phase1204527150
TR 24030075055060024010007809703.11-phase1656028150
TR 240 LS26075053060024010009909706.33-phase1806028150
TR 420300130055060042015508159706.33-phase2506028200
TR 4503007505501100450100078014706.33-phase23560315180
TR 450 LS26075053011004501000990147012.63-phase25060315180
TR 80030012006701000800147097015206.33-phase36080310250
TR 1050300120067014001050147097019209.33-phase45080414250
1External dimensions vary when furnace is equipped with additional equipment. Dimensions on request*Please see page 75 for more information about supply voltage
2In the empty and closed oven, connected to 230 V 1/N/PE resp. 400 V 3/N/PE
3Max load per layer 30 kg

Chamber Ovens up to 260 °C

Chamber oven KTR 1500 with charging cart Chamber oven KTR 22500/S with chamber lightning and drive-in tracks with insulated plugs which provide for an optimal temperature uniformity

Chamber oven KTR 4500

Drive-in tracks with sealing shoes

Charging cart with pull-out trays

Pull-out shelves, running on rolls

The chamber ovens of the KTR range can be used for complex drying processes and heat treatment of charges to an application temperature of 260 °C. The high-performance air circulation enables optimum temperature uniformity throughout the work space. A wide range of accessories allow the chamber ovens to be modified to meet specific process requirements.

Standard Equipment

  • Tmax 260  °C
  • Electrically heated (via a heating register with integrated chrome steel heating elements) or gas-fired (direct or indirect gas-fired including injection of the hot air into the intake duct)
  • Temperature uniformity up to +/− 3  °C according to DIN 17052-1 (for design wihout track cutouts)
  • High-quality mineral wool insulation provides for outer temperatures of < 25  °C above room temperature
  • High air exchange for fast drying processes
  • Double-wing door for furnaces KTR 2300 and larger
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the oven and load
  • Incl. floor insulation
  • Controller B400 (5 prgrams with each 4 segments)

Additional Equipment

  • Track cutouts for level drive-in of charging cart
  • Base frame to charge the oven via a charging forklift
  • Additional Door in the back for charging from both sides or to use the oven as lock between two rooms
  • Fan system for faster cooling with manual or motor-driven control of the exhaust flaps
  • Programmed opening and closing of exhaust air flaps
  • Air circulation with speed control, recommendable for processes with light or sensitive charge
  • Observation window and furnace chamber lighting
  • Charging cart with or without rack system
  • Process control and documentation via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions2 in mmHeating powerElectrical
 °Cwdhin lWDHin kW1connection*
KTR 10002601000100010001000182014301890183-phase
KTR 15002601000100015001500182014302390183-phase
KTR 20002601100150012002000192019302090183-phase
KTR 23002601250125015002300212016802460273-phase
KTR 31002601250125020003100212016802960273-phase
KTR 34002601500150015003400237019302460453-phase
KTR 45002601500150020004500237019302960453-phase
KTR 46002601750175015004600262021752480453-phase
KTR 60002602000200015006000287024302460543-phase
KTR 61252601750175020006125262021752980453-phase
KTR 62502601250250020006250212030352960543-phase
KTR 80002602000200020008000287024302960543-phase
KTR 90002601500300020009000249038702920723-phase
KTR 1230026017503500200012300262043502980903-phase
KTR 13250260125050002000132502120617029601083-phase
KTR 16000260200040002000160002870485029601083-phase
KTR 21300260265035502300213003600419533801083-phase
KTR 22500260200045002500225003140540035001083-phase
1Depending on furnace design connected load might be higher*Please see page 75 for more information about supply voltage
2External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.

High-Temperature Ovens, Forced Convection Chamber Furnaces up to 850 °C

Forced convection chamber furnace NAT 15/65 as table-top model Forced convection chamber furnace NA 120/45

Forced convection chamber furnace NA 30/65 with manual lift door and protective gas box

Forced convection chamber furnace NA 250/85

Port for thermocouple


Roller conveyor in furnace chamber

These chamber furnaces with air circulation are characterized by their extremely high temperature uniformity. Hence, they are especially suitable for processes such as annealing, crystalizing, preheating, curing, but also for numerous processes in tool making. Due to the modular concept, the forced convection furnaces can be adjusted to the process requirements by adding suitable equipment.

Standard Equipment

  • Tmax 450 °C, 650 °C, or 850 °C
  • Horizontal air circulation with optimum distribution through stainless steel baffles
  • Swing door hinged on the right
  • Temperature uniformity up to +/− 4 °C according to DIN 17052-1 (NAT 15/65 and NAT 30/85 up to +/− 5 °C) in the empty work space
  • One frame sheet and rails for two additional trays included in the scope of delivery (NAT 15/65 and NAT 30/85 without frame sheet)
  • Base frame included in the delivery, NAT 15/65 and NAT 30/85 designed as table-top model
  • Controller B400/B410 (5 programs with each 4 segments)

Additional Equipment (not for Model NAT 15/65 and NAT 30/85)

  • Optimization of the temperature uniformity up to +/− 3 °C according to DIN 17052-1 in the empty work space
  • Air inlet and exhaust air flaps when used for drying
  • Controlled fan assisted cooling
  • Manual lift door (up to model NA 120/..)
  • Pneumatic lift door
  • Air circulation with speed control, recommendable for processes with light or sensitive charge
  • Additional frame sheet
  • Gas supply boxes different charging methods
  • Feed and charging aids
  • Charge control with documentation of the charge thermocouple
ModelTmaxInner dimensions in mmVolumeOuter dimensions3 in mmConnectedElectricalWeight
 in °Cwdhin lWDHload in kWconnection*in kg
NA 30/45450290420260301040129013853.61-phase285
NA 60/45450350500350601100137014756.63-phase350
NA 120/454504506004501201250155015509.83-phase460
NA 250/4545060075060025013501650172512.83-phase590
NA 500/45450750100075050015501900182018.83-phase750
NA 675/45450750120075067515502100182025.03-phase900
NAT 15/651650295340170154707904603.31-phase60
NA 30/6565029042026030870129013857.03-phase2285
NA 60/6565035050035060910139014759.03-phase350
NA 120/656504506004501209901470155013.03-phase460
NA 250/6565060075060025011701650168021.03-phase590
NA 500/65650750100075050012901890182528.03-phase750
NA 675/65650750120075067512902100182528.03-phase900
NAT 30/851850320320300308008005906.01-phase90
NA 60/85850350500350607901330144011.03-phase315
NA 120/858504506004501208901420154014.03-phase390
NA 250/8585060075060025011201690181023.03-phase840
NA 500/85850750100075050012701940196034.03-phase1150
NA 675/85850750120075067512702190196034.03-phase1300
1Table-top model*Please see page 75 for more information about supply voltage
2Heating only between two phases
3External dimensions vary when furnace is equipped with additional equipment. Dimensions on request.