Alchemist 20L


The Alchemist production rotary evaporator is used whenever benchtop system capacity is no longer sufficient. Featuring a large capacity 20L evaporation flask and capable of evaporating 4L/h water and 11L/h of ethanol. The in-process product feed and waste discharge valve system allow for continuous distillation. Our PID controller enables accurate process control and is extremely easy to use. The bath temperature of up to 180°C covers all common solvents and even allows for in-evaporator decarboxylation if required.


  • ETL and CE rated
  • Safety coated glassware to protect users in case of glass breakage
  • Temperature overheat protection at 220 °C
  • Run-dry protection, automatically powers off if operating without any water/oil in the heating bath
  • Automatic motor lift releases the evaporating flask to a safe position in case of power failure

Features & Benefits:

  • Continuous evaporation possible thanks to in-process feed and drain setup
  • Large LCD with bath temperature, rotation speed, rotation direction and time
  • One-click automatic motor lift
  • Water/oil heating bath with wide temperature range from ambient to 180 °C
  • Flask speed range from 10 to 150 rpm with interval operation and rotation direction select
  • Double-layer high-efficiency condenser with large condensation area for high evaporation performance and solvent recovery rates
  • Patented PTFE double sealing vapor tube seal with excellent performance

Technical details

  Alchemist 20L
HGS SKU Number 10206001
Power Specification 220V 50/60Hz 1ph – 4600W
Power Plug Not Included
Evaporation Performance Water 4.0 L/h (max)
Size 20 L
Temperature Range ambient to 180 ​ °C ​ ( water and oil mode)
Temperature Control Accuracy Water: ± 1 ​ °C Oil: ± 3 ​ °C
Rotation Speed 10 – 150 rpm
Ultimate Vacuum < 2.6 mbar
Temperature Control Method Microprocessor PID Control
Display LCD temperature / flask rotation speed / flask rotation direction / time
Safety Features Motor Overcurrent Protection, Residual Current Device, Lifting Overload Protection, Boil-dry Protection, Over-Temperature Protection
Sample Flask Round flask 20L
Receiving Flask Round Flask 10L with Drain Valve
Condenser Two-Section Vertical Triple Serpentine Condenser, Cooling Surface 1.2m2
Heating Bath Size φ 450×240mm
Connectors Cooling/Suction Nozzle Outer Diameter 10mm, Vacuum Pump nozzle outer diameter 10mm
Dimension [D×W×H] 1160mm×600mm×1860mm
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Product Pictures