ProTear Elmendorf Electronic Tearing Tester

The Protear Elmendorf tearing resistance tester is for determining the sheet tear strength of sheet materials. Manufactured by Thwing Albert, it is equipped with pneumatic grips, pneumatic pendulum release, offers statistical analysis of results and a range of interchangeable pendulums for testing a wide range of substrates.

ProTear Elmendorf Electronic 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 measure accurately the tear resistance of sheet materials including paper, packaging, foils, textiles, non-wovens and plastic films.

Operation – 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, mN, g or lb.

The electronic ProTear tester is distinguished by good design, ease of operation and menu-driven software, which enable crucial data to be obtained in seconds. Specimen data can be input as thickness; g/m2; number of plies being torn; MD/CD direction and an indication of the results of the pendulum capacity specific to the specimens, displayed in %, mN or g.

There are several configurations ranging from 200 to 6400 g, with capacities quickly and easily changed using augmenting weights, which both eliminate the need for multiple pendulums and simplify the testing of different materials.

Protear Elmendorf Electronic Tester Video

Protear Elmendorf Electronic
Tearing Tester in Action


  • 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 the pendulum capacities between 200 and 6400 g
  • Calibration weights of 200, 400, 800, 1600, 3200 and 6400 g 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 it for specific requirements and then transfer it to any Windows application. Enables creation of graphs and reports that automatically update with real-time data
DIN 53862 53128 ISO 1974 EN 21974 ASTM D295 D751 D1424 D1922 TAPPI T-414 T-496 BS 4253 4468 CPPA D.9 SCAN P-11


Capacity: 200, 400, 800, 1600, 3200, 6400 g Accuracy: ± 0.2% of pendulum capacity Result reporting: Digital via encoder
Results units: % of pendulum capacity, g, lb, mN Display: 4 line by 16-character backlit LCD Test memory: 99 tests with statistics
Statistical analysis: Mean value, standard deviation, highest, lowest values, variance Specimen clamp: Pneumatic Pendulum release: Pneumatic
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 40 x 58 cm (W x L x H)
  • Net weight 15.2 kg

Related Instruments and Attachments

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ProTear Heavy Duty
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For further information, please contact our sales team on 01223 492081 or via