Heratherm Large Oven

Thermo Scientific* Heratherm* Large-Capacity Mechnical/Forced Convection Ovens


Thermo Scientific* Heratherm* Advanced Protocol Ovens include mechanical convection technology with excellent temperature values, providing flexibility, accuracy and dependability. Heratherm Advanced Protocol Ovens provide unsurpassed temperature performance–the flexible tool in the lab to be used for multiple applications. Mechanical convection models provide temperature uniformity of ±3.0°C or better, and temperature stability of at least ±0.2°C at 150°C.


  • • Broad temperature range—up to 330°C
  • • Adjustable fan speed for application-related airflow in mechanical convection models (e.g. drying of powders)
  • • High speed for expedited drying and heating, quick recovery, and optimal temperature stability and uniformity
  • • Programmable controller for temperature ramps and dwells
  • • Up to 10 programs can be saved, each with 10 discrete steps
  • • Features electronically controlled fan speed and damper position
  • • Programs can be repeated automatically
  • • Access port allows the introduction of sensors for independent data monitoring
  • • Simple calibration routine ensures temperature accuracy over time


Specifications OMH400 OMH400-SS OMH750 OMH750-SS
Convection Technology Mechanical convection
Chamber Volume 396 liters (13.98 cubic feet) 731 liters (25.81 cubic feet)
Exterior Coated-steel Stainless-steel Coated-steel Stainless-steel
Temperature Range Ambient +10° to 250°C
Temperature Uniformity @ 150°C ±2.1°C ±3.1°C
Temperature Stability @ 150°C ±0.3°C ±0.4°C
Timer Weekly / Real Time / Hour
Controller Programmable Microprocessor control with vacuum fluorescent display
Footprint .56 square meters (6.0 square feet) .91 square meters (9.8 square feet)
Interior Dimensions
(D x W x H)
545 x 544 x 1335 mm
(21.5 x 21.4 x 52.6")
545 x 1004 x 1335 mm
(21.5 x 39.5 x 52.6")
Exterior Dimensions
(D x W x H)
770 x 778 x 1545 mm
(30.3 x 30.6 x 60.8")
770 x 1261 x 1545 mm
(30.3 x 49.7 x 60.8")
Number of Shelves 2 supplied, 39 maximum
Maximum Shelf Load 40 kg / 88 lbs.
Electrical Information 208-240VAC 60Hz; 3000w; 13.5A; Nema 6-20 208-240VAC 60Hz; 3000w; 14.5A; Nema 6-20
Weight 135 kg / 298 lbs. 185 kg / 408 lbs.

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