Protear Elmendorf Heavy Duty Tearing Tester

The Protear Elmendorf heavy duty tearing resistance tester is a microprocessor controlled tear tester with testing capacities up to 25,000g. Manufactured by Thwing Albert, the instrument is specifically designed for heavy duty substrates and equipped with pneumatic pendulum release, statistical analysis of results and with a choice of interchangeable pendulums.

Protear Elmendorf Heavy Duty Tearing Tester

The Elmendorf Tear Testers are essential in materials quality control, providing more information on tearing properties than any other instrument. They are recognised as the worldwide standard and are the best way to accurately measure the tear resistance of heavy duty sheet materials.

The tearing resistance of a material is measured via the transference of the potential energy stored in the raised pendulum to kinetic energy. A portion of this energy is absorbed during the tearing of the sample and is used as a measure of the material’s resistance to a continuing tear. The force required to tear the sample is reported as a percentage of the pendulum capacity.

The heavy duty tester offers capacity configurations ranging from standard 6,400g increasing to 25,000g. Capacities are changed quickly and easily by adding augmenting weights, a configuration that eliminates the necessity for multiple pendulums and simplifies the testing of different materials.


  • User-friendly, one-touch software offering:
    • test results that include tear strength, tear per ply, average tear strength and tear index
    • rapid sample data entry – thickness, basis weight, sample id and sample direction
    • a configurable display of test parameters, results and reports
    • ability to delete and restore test results
    • results displayed as a percentage of pendulum capacity, g, lb and mN
    • statistics including average, high, low, standard deviation, range and variance
  • Digital encoder ensures accurate results – 0.2% accuracy of the pendulum capacity
  • RS-232 data output
  • One-touch pneumatic clamping and pendulum release


  • Augmenting weights – quick change of pendulum capacities to 12,800 – 25,600g
  • Calibration weights of 6,400g to verify instrument calibration
  • Calibration certificates for augmenting weights and calibration weights
  • Spencer Impact Attachment – measures the impact resistance of various materials, typically plastic film. Complies with ASTM D3420
  • Data acquisition software (DAS) to capture serial data, customise them for specific requirements and then transfer them to any Windows ¨ application. Enables creation of graphs and reports that automatically update with real-time data
Standards DIN 53862 53128 ISO 1974 ASTM D295 D751 D1424 D1922 TAPPI T-414 T-496 BS 4253 4468 CPPA D.9 SCAN P-11


Capacity: Heavy duty – 6,400, 12,800 and 25,600g Accuracy: Heavy duty ± 0.2% of pendulum capacity Result reporting: Electronic digital through encoder
Results units: Electronic % of pendulum capacity, g, lb, mN Specimen clamp: Pneumatic or manual Pendulum release: Pneumatic
Statistical analysis: Mean value, standard deviation, highest, lowest values, variance Display: 4 line by 16-character backlit LCD Test memory: 99
Air supply: Compressed air 6 bar Power supply: 110 V, 50/60 Hz; 220/230 V, 50 Hz; 240 V, 50 Hz Power consumption: Operating maximum 600 W. Standby maximum 12 W
Operating/storage environment Physical specifications
Air temperature

  • operating 10-50 °C
  • storage -25-70 °C
Relative humidity

  • operating 10-85% (non-condensing)
  • storage 5-90% (non-condensing)
  • Dimensions: 48 x 58 x 40 cm (W x L x H)
  • Net weight: 16.8 kg (basic device less pendulum and weight)

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For more information, please contact our sales team on 01223 492081 or via