Hei-Torque Precision

Category Overhead Stirrers
Manufacturer Heidolph
Country of manufacture Germany
Overview

These stirrers are ideal for demanding tasks which have to be reproducible and documentable. The huge number of additional features and operation modes allows for a perfect adjustment to your individual application


Features:

  • Accurate torque indication shows any viscosity changes
  • Constant speed even under changing loads
  • Digital 3.2" display for ease of operation:
  • Allows for pre-programmed profiles
  • Saves these profiles in memory
  • Interval operation
  • Watch rpm and torque graph life
  • Timer / Countdown / Real time settings
  • Newest motor generation provides maximum power at minimum noise level
  • Safe start and stop of operation via slide touch panel to avoid unintended stirring
  • USB interface to save all process data in a digital file
  • Free software to automate and to save all process parameters
Key Attributes 
Maximum volume (L): 50 or 100
Minimum Volume (L): N/A
Speed max (rpm): 2000
Speed min (rpm): 10
Max temperature (◦C): N/A
Plate:  N/A
Plate material: N/A
Torque max (Ncm): 100, 200, or 400
Controls: Digital
Timer: Yes
Programmable: Yes
Reverse rotation: No
Warranty (years): 3
Weight (lbs): 9, 11, or 11.5
Dimensions Width (in): 3.4 or 6.7
Dimensions Height (in): 10.8
Dimensions Length (in): 9.5

Manufacturer Specifications 
Model Hei-TORQUE Precision 100 Hei-TORQUE Precision 200 Hei-TORQUE Precision 400
P/N (115 V) 036093090
036093095
036093110
036093115
036093150
036093155
Power rating, motor input/output (W) 90/50 120/80 150/90
Number of speed gears 1 1 2
Speed range 10 – 2,000 10 – 2,000 10 - 400
200 – 2,000
Speed indicator digital
color 3.2"
digital
color 3.2"
digital
color 3.2"
Speed control electronic electronic electronic
Torque, maximum (Ncm) 100 200 400
Torque indicator precise value precise value precise value
Overheat protection automatic
cut-out
automatic
cut-out
automatic
cut-out
Motor protection temperature
control software
temperature
control software
temperature
control software
Viscosity, max (mPa s) 60,000 100,000 250,000
Stirring cap. (H2O), max. (L) 50 50 100
Analog/digital interface USB USB USB
Admissible session continuous
operation
continuous
operation
continuous
operation
Counter/Timer yes yes yes
Shaft diameter, max. (mm) 2.5 - 10.5 2.5 - 10.5 2.5 - 10.5
Through-shaft design Yes Yes Yes
Ambient temperature range 5 °C - 31 °C at
80 % rel. humidity,
32 °C - 40 °C
linearly increasing
to 50 % relative
humidity
5 °C - 31 °C at
80 % rel. humidity,
32 °C - 40 °C
linearly increasing
to 50 % relative
humidity
5 °C - 31 °C at
80 % rel. humidity,
32 °C - 40 °C
linearly increasing
to 50 % relative
humidity
Dimensions (wxhxd)(mm) 86 x 273 x 241 86 x 273 x 241 93 x 273 x 241
Stay bar size (dia. X l) (mm) 13 x 160 13 x 160 13 x 160
Weight (kg) 4.1 5 5.2
Protection class (DIN EN 60529) IP 54 IP 54 IP 54
FAQ

I am working with a volatile, flammable solvent. Are the Hei-Torque overhead stirrers suitable for use with flammable vapors?

No, they are not. To do so, they would need to carry an explosion-proof certification, which they do not have.

 

What is the accuracy of the torque measurement?

The torque readout on the Hei-Torque Precision has an accuracy of ±5% of the full scale value (for Hei-Torque 200 this would be ±10 N•cm, as full-scale is 200) when calibrated, or ±10% when it is not calibrated.

The accuracy is relatively low because the Hei-Torque Precision does not measure torque directly.

 

What is the speed accuracy of the Hei-Torque Precision?

The accuracy is +/-1% of the readout value. So, for example, if the speed is 1000 rpm, the real value would be between 990 and 1010 rpm. There is no calibration required to maintain the speed accuracy.

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