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OS-AUTO Motorized Durometer Test Stand

Made in USA
OS-AUTO Motorized Durometer Test Stand
Click images to enlarge.
The OS-AUTO Durometer Test Stand is designed for precision hardness measurements on rubber, plastics and other materials. The OS-AUTO provides constant load, controlled rate of descent, and application velocity, through a geared electric motor and braking mechanism that alternately lowers the durometer onto the specimen and then raises it in preparation for the next test.

This OS-AUTO also provides an electronic timer that can adjust the amount of time the durometer remains in the lowered position (dwell time).

The durometer and carriage assembly have a mass sufficient for use with Types A, B and O. The incorporation of the large detachable mass is required for testing with Type C, D and DO durometers. The OS-AUTO can also be configured for use with durometer Types OO, OOO and OOO-S.

Adjustment of the durometer for specimen thickness is easily accomplished by a height adjusting knob on the top of the stand.

Durometer Sold Separately


  • Motorized Controlled Rate of Descent
  • Applies Correct Load Per ASTM D2240
  • Eliminates Operator Error
  • Adjustable Dwell Time
  • Precision Machined Frame with Powder Coated Base
  • Stainless Steel Housing for Durability and Ease of Maintenance
  • High Quality Electric Motor and Servos Provide Reliable Operation and Long Life
  • Includes D Weight

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Durometer ScalesA, B, C, D, DO, O, OO, OOO, OOO-S, E (Specify requirement when ordering)
Over Dimensions (DxWxH)13 x 6.125 x 9.75 in (356 x 156 x 248 mm)
Specimen Table Dimensions7 x 6 in (177 x 182 mm)
Throat Depth3.25 in (83 mm)
Throat Height3.125 in (79 mm)
Weight (without additional mass)35 lb (16 kg)
Specimen ThicknessMinimum: 0.240 in (6 mm) per ASTM D2240
Maximum: varies with durometer model; ~3 in (75 mm)
Timer Operation0 through 9999 seconds
Power Requirements120 VAC 60 Hz | 240 VAC 50 Hz optional
Operating Temperature73.4 ± 3.6 °F (23.0 ± 2.0 °C)
NOTE**Not intended for production control or continuous use**

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Item Description Price
Motorized Durometer Test Stand for A, B, C, D, DO, O, OO, OOO, OOO-S, E Scales (Specify when ordering)
In stock
1 Week Lead Time (Estimated)
2-3 Week Lead Time (Estimated)
Lead Time Varies, Please contact us for availability.