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  • A photograph of a 21015 hst20 series stir tester w/ 1/8 hp permanent magnet dc motor.

HST20 Series Stir Tester w/ 1/8 HP Permanent Magnet DC Motor

Item #: 21015

Normal Availability: 4-5 business days

Product Description

The HST20 series of stir testers is available in a direct drive or gearmotor version and has a totally enclosed, reversible, 1/8 hp, permanent-magnet DC motor in your choice is 120 or 240 V input. The digital readout displays speed in rpm's and torque in lb-in (kg-cm for geared motors). The front panel switch toggles between speed and torque.

Features include:

  • Actual speeds are displayed and maintained by a synthetic tachogenerator. (Speed is kept within less than 1% of the base speed from no-load to more than 100% of full-load regardless of AC line voltage fluctuations of 10%.)
  • Viscosity measurement is easier thanks to a controller with a digital readout switchable between speed and torque.
  • Data on shear stress, shear rate, velocity gradients, and viscosity is accumulated easily with external DC multi-volt signals for speed and torque (for strip or X-Y recorders) available through an output port on the rear of the control.
  • Operator convenience and safety is increased with cord connections between drive motors and controls to allow control placement away from hostile environments.

This system is furnished complete with a reversible drive motor and mounting bracket, controller, and the following accessories:

Stand sold separately (stir tester is shown here with the recommended item# 21058 stand). The controller lab bench case measures 8" w x 8" d x 4.75" h. The motor bracket is 4.50" x 4.50" d x 9.5" h with an 8.5" rod. Foxtip gray and charcoal finish. Product weight: 16 lb (7.26 kg) for the direct drive and 20 lb (9.07 kg) for the geared versions.

Can't decide which stirrer to buy? Check out this handy selection chart.

Version Max RPM Torque (lb-in) Torque (kg-cm) Torque (Nm)
Direct Drive 2,500 3.1 3.57 0.34
4:1 gearmotor 660 6.0 6.90 0.66
9:1 gearmotor 266 21.0 24.20 2.31
20:1 gearmotor 125 46.0 53.00 5.06
44:1 gearmotor 57 96.0 111.00 10.56

Other Details

Manufactured in: USA

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