Heidolph 501-64010-00 Hei-TORQUE 400 Value Overhead Stirrer, 250,000 (mPa s), 100 Litres, 10 - 400 rpm - 20 - 2,000 rpm

Number of speed gears 2
Rotation speed range 10 - 400 rpm  - 20 - 2,000 rpm
Rotation speed indicator digital
monochrom 2.4"
Speed control electronic
Max. torque 400 Ncm
Torque indicator symbol
Overheat protection automatic cut-out
Viscosity max. 250,000 mPa s
Stirring cap. (H₂O), max. 100 l
Thought-shaft design
Shaft diameter, max. 10.5 mm
Counter/ Timer -
Analog / digital interface -
Power rating motor input 150 W
Protection class DIN EN 60529 IP 54
Call 01463 830401 For Any Assistance

Basic model

The reliable solution for all standard applications that do not need documentation

These stirrers are ideal for standard stirring tasks. They are designed to mix and disperse media that require non-reproducible results in high-viscosity applications

  • Indication of torque tendencies to monitor viscosity changes
  • Digital 2.4” display for ease of operation
  • Constant speed even under changing loads
  • Safe start and stop of operation via slide touch panel to avoid unintended stirring
  • Newest motor generation for maximum power at minimum noise level

Range of Performance

400 Ncm

Performance graph of:
Hei-TORQUE Value 400

A 2-gear stage design guarantees highest power over the entire speed range


Hei-TORQUE Value 400 - Product Advantages

  • The electronic stirrers feature individual setting of the start operation, which prevents spills and splashing media. The speed ramps up slowly until your set rpm has been reached 
  • An optional shaft guard prevents accidents
  • Non-sparking motors for additional safety
  • Important for continuous operation: the motor will be switched off if a high thermal load situation occurs to increase safety in your lab and to prevent accidents
  • Safe start and stop of operation via slide touch panel to avoid accidental start-up
  • To protect your stirrer against corrosion and short-circuits, all models comply with the protection class IP 54
  • Setting a rotation speed limitation prevents splashing media
  • Unique Quick-Chuck for immediate and convenient “one-hand” impeller changing - without tools
  • Opening the safety ring blocks accidental operation
  • An audible signal confirms a tight fit of the impeller
  • No more misplacing and searching for the chuck key! Immediate and convenient ”one-hand“ impeller changing with the Quick-Chuck - without any tools
  • Newest motor generation for maximum power at minimum noise level below 50 dB
  • All stirrers maintain exact speed under changing loads
  • A through-shaft design allows for adjusting the impeller position to make height adjustments more convenient for you
  • Reduce your work time and achieve excellent mixing results in challenging high-viscosity media
  • A single grip allows you to re-adjust the height of your stirrer on the optional telescopic stand
  • The outstanding product design with intuitive touch-panel made of glass has been honored with the prestigious iF DESIGN AWARD in 2016
  • Reduce your maintenance costs: the sealed housing protects your stirrer from aggressive fumes, liquids and vapors to prevent internal corrosion. This results in an increased lifespan of 10 years on average while reducing maintenance and repair cost
  • The high torque level accounts for better mixing results in less time to reduce your process time and working hours significantly
  • Maintenance-free motors reduce repairs and down times significantly to ensure years of continuous operation
  • The unique impeller technology for demanding applications that mixes gels and other similar media in shorter times which reduces process cost and working hours
  • The sealed panel made of glass increases the tightness of the entire housing
    • SKU
  • Stirring quantity max. per stirring position (H2O) (L)
  • Speed range (rpm)
    10 - 400 rpm - 20 - 2,000 rpm
  • Viscosity max. (mPas)
  • Motor rating output (W)
  • Manufacturer
    Heidolph Instruments GmbH

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