Automatic Extensometer – Models AE300 and AE500

The extensometer models AE500 and AE300 are ideal for nearly all samples with an initial gauge length from 10 mm. Their low clamping forces integrated with high measurement accuracy makes them extremely ideal even for small, notch sensitive test samples. The AE series can be attached to partly or fully automatic testing machines and used with various types of grips. The strain can be measured from the elastic range to fracture for nearly all types of samples. When used in combination with the transverse models, the AE extensometers are ideal for testing the deep-drawing properties of thin sheets.

Design and Function

Each one of the four measuring arms of the AE models have a measuring spring bonded to a full bridge strain gauge. The measuring springs of a left and right arm pair are connected in parallel to attain an average value which is crucial if the sample deforms non-homogeneously. DC motors compensate the variations in the measuring spring signal initiated through the sample elongation by a ball-bearing gear guaranteeing that the measuring heads move consistent with the sample elongation and make the measuring heads follow the sample extension. The elongation is captured by an opto-incremental measuring system. The measuring heads mounted on the measuring arms reveal an exact parallel movement which is attained through a zero-backlash linear guidance system. Using this principle avoids errors which happen when employing measuring sensors with fixed points of rotation through angle variations and also errors because of tilting of the knife edges on the sample. The measuring heads and arms can be detached from the linear guidance system and can be changed quickly and easily.


The AE extensometers are regulated through Tinius Olsen’s Horizon software via a serial interface (RS 232 or USB). All movements can be commenced whenever required. The measuring arms can be positioned parallelly within the available interval under computer control and therefore can quickly be attuned symmetrically to different sample lengths. The gauge length (L0) can be fixed from 10 mm to the maximum possible measuring stroke. The travel is easily calculated from the maximum measurement range of 300 mm (or 500 mm for the AE500) less the gauge length.

The AE models have an extra positioning range of 190 mm for the symmetrical adjustment of the initial gage length. With the arms open the necessary measurement position can be approached. Before the approach of the measuring position the digital measurement system is calibrated by reference marks. The opening and closing of the arms can be started whenever required.


Accuracy class EN ISO 9513 0.5 0.5
Accuracy class ASTM E83 B1 B1
Measurement principle Opto - incremental
Travel (minus gage length) 300 mm 500 mm
Position travel 190 mm 190 mm
Gauge length 10 to 300 mm 10 to 500 mm
Indication error (rel.)* 0.5% 0.5%
Indication error* 1.5 μm 1.5 μm
Error in linearity 0.005 0.005
% Error in gauge length 0.5% 0.5%
Resolution 1 or 0.1 μm 1 or 0.1 μm
Activating force <0.01 N <0.01 N
Clamping force ** 0.25 N 0.25 N
Operating temperature range 0 - 50 °C 0 - 50 °C
Weight Approx. 26 kg Approx. 31 kg

* The larger of the values is admissible
** The clamping force can be adjusted by tension springs


1. Measurement in compression or deflection. The AE models work in tension or compression, however, an optional module can be incorporated that will permit the models to work in both directions.

2. Different lengths of measuring arms, and higher travel available. Measuring arms of either an extra 75 mm or 200 mm length (additional to the standard length of 254 mm) can be used to follow the specimen movement, enabling the extensometer to be used at a greater distance from the specimen.

3. The installation of a fan/ventilator for use in dusty/dirty environments. Any dust or dirt can be disastrous with electronics and fine measuring systems, so putting the extensometer under a positive pressure prevents the ingress of dirt and dust.

Sample Dimensions

. .
Maximum sample thickness 30 mm
Maximum sample width 50 mm
Maximum sample diameter 80 mm


Compatible with Tinius Olsen electromechanical and hydraulic tension and compression testing machines.

Key Features

  • Two-sided measurement by means of four measuring sensors
  • Very low clamping forces even allow testing of thin wires and foils
  • Very high resolution of up to 0.1 μm over the complete measuring range
  • The gauge length position and value can be precisely set under computer control
  • The round knife edges can be utilized along their whole perimeter by rotating them


Tinius Olsen is based on its long history of providing solutions to a huge variety of testing problems to develop Horizon, a wide-ranging software program that makes testing simple, efficient, and precise. Whether the test sample is metal, composite, polymer, paper, textile, rubber, or a micro-component, Tinius Olsen’s Horizon software extends beyond data collection and presentation. It will help automate operations, from R&D to the charting and analysis of QC testing. Tinius Olsen Horizon software sets new standards of data analysis by incorporating a host of report writing and data manipulation capabilities that will make easy work of materials testing programs.

As with a majority of features of Horizon, flexibility is crucial; reports can be tailored by operators in any format they wish, as can all user screens, allowing operators to focus on features that are most significant to them. Besides powerful reports, Horizon Materials Testing software is both networkable and scalable so that operators and managers can work equipment and review test results from many locations and sources. Horizon offers a library of standard, specific, and application-focused test routines that have been developed in close co-operation with customers globally and to the standards they are using.

Among the many beneficial features offered by Horizon are: simultaneous multiple machine control; a test routine library; test, output, method and result editors; and multilayered security. This software is built for data acquisition, data analysis, and closed loop control of almost all Tinius Olsen testing machines. Horizon is rich with capabilities that enhance productivity and enable users to build, access, and use an advanced, powerful materials testing database. It employs the latest Windows environments, running on touchscreen-enabled monitors, to provide an intuitive user experience. Integral tutorials, online help, and help desk access offer extra user support.

Key Features

  • Seamless integration into Horizon software
  • In-built set-up and calibration of AE extensometers
  • Operation of follower arms on unique test button on test screen
  • Integral signal conditioning and data collection

Automatic Extensometer – Models AE300 and AE500

Automatic Extensometer – Models AE300 and AE500: Picture-1
Automatic Extensometer – Models AE300 and AE500: Picture-2
Automatic Extensometer – Models AE300 and AE500: Picture-3
Close-up of follower arms on AE300 and transverse AE extensometers on specimen.
“Horizon makes testing simple, precise and efficient”
“Horizon makes testing simple, precise and efficient”
“Horizon makes testing simple, precise and efficient”

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