Laboratory Products

Drying – Drying Ovens

MARC has been manufacturing large capacity high-performance Industrial DO1, DO2 and DO4 trolley drying ovens for decades. Our DO1, DO2 and DO4 trolley drying ovens have an exceptionally long life expectancy that spans decades. 


1. Large Capacity Trolley-Ovens 

Even heat distribution throughout the chamber is notoriously difficult to achieve in large ovens – but our DO2 oven has always been the market leader in that regard. We paused the manufacturing of our flagship large-capacity trolley-oven range to spend a significant amount of time engineering in even better heat distribution – and now we can offer a leap forward in performance improvement.   

We are now pleased to announce the re-release of our DO2E and DO4E ovens as well as our new-generation DO2E-HP, and our new containerised DO4 Rack Oven



Re-designed from the ground up our flagship DO2E-HP oven now includes performance improvements in:

  1. Air Flow – A larger Volume Direct-Drive Fan;
  2. Air Distribution – A High-Performance Slotted Air Distribution System;

  3. Graphical Temperature Display

  4. Insulation – Two Stages of Insulation dramatically Improves Heat Retention; 

  5. Drip-Free Exhaust Management – i.e. Condensing Steam doesn’t Run back into the Oven; 

  6. Stainless Steel Load-Rated Trolley Design – Our Standard Oven Trolley is Now Independently Load Rated to 900 kg;

  7. Upgrade Options:

    • Relative Humidity Probe – View a Graphical Display of the RH over Time – know when your samples are dry.

    • Auto-Purge Control – When used with the Relative Humidity Probe the Oven will Purge Moist Air at a Pre-Set Internal Humidity Limit. At 105 °C the benefit of this is limited and will primarily aid in steam, smell or noxious off-gas removal but for lower temperature drying this can reduce drying time by up to 23%.  

Our standard DO2E and DO4E ovens have recently benefitted from a fan size increase to improve air flow and heat distribution in the chamber. 


No. of Trolleys
Trolley Useful Sample Volume
Design Temp / Max. 
Stock Code
DO2E 2 1 Each x 2 = 2 m3 Total 105 / 115  118511
DO2E-HP 2 1 Each x 2 = 2 m3 Total 105 / 150 123936
DO4E 4 1 Each x 4 = 4 m3 Total 105 / 115 125307
DO4-CON 4 Stacks of 6 Racks 1.2 each = 4.8 m3 Total 105 / 150 190038
Accessories and Upgrades:
DO2-HP 316 SS Trolley (WLL = 900 Kg) 123941
DO2/4E 316 SS Trolley (WLL = 900 Kg) 128179
DO2/4E Standard Mild Steel Trolley (unrated) 130601
RH (Relative Humidity) Probe 123946
Auto-Purge (At High Humidity – Requires Part # 123946) 123951
DO4-CON Rack 920 x 920mm (24 racks per oven) 190039



2. Portable Large Capacity Rack-Ovens 

Larger capacity drying ovens than the DO2 size are even more notorius for heat distribution problems. Typically they are simply extended DO2 ovens with the same electrical components and fans despite containing double the internal volume, double the sample volume and therefore (potentially) double the moisture volume. More moisture means more heat loss from the hot air moving through the oven…so more energy is needed.

Our DO4E (4 x 1m3 trolleys) oven – like our DO2E – has been upgraded with a faster moving air system for better heat distribution. But we now are also introducing a containerised higher capacity, higher airflow oven made for using stackable racks – the DO4-CON. In this DO4-CON Rack Oven the sample drying capacity increases from the DO4’s 4 x 1m3 to 4 x 1.2m3 but in stackable racks and not trolleys.  Stacked sample racks are removed from the oven with a forklift and placed on dollys or on battery operated lift-tables for relocation. 

Due to the physical size of this oven it is not available for export but it is relocatable and is designed to sit out in the elements – and so does not need a cover

Contact us to discuss your needs. 


3. Smaller Capacity Floor- or Bench-Mounted Drying Ovens

We also supply smaller bench-mounted and intermediate floor-standing ovens. These  can reach temperatures of up to 250°C. 

720L Drying Oven on Optional Stand


Model Vol. Shelves Trolleys Design Temp Max.(°C) Stock Code Additional Shelf Stock Code 
DO12E 12L 2 N/A 250 111666 111696
DO30E 30L 111681 111701
DO60E 60L 120331 111666
DO125E 125L 111671 111711
DO150E 150L 189859 114336
DO240E 240L 111686 111706
DO430E 430L 111691 111716
DO720E* 720L 189223  113931

*Available with optional 150mm floor stand for wet areas.