Seven devices designed to measure axial and transverse (diametral) displacement of samples and to calculate Poisson ratio.
- Model 3542RA Averaging Axial Extensometers
Designed primarily for compressive strength tests on rock, concrete and other large compression samples, this model measures axial strain on opposite sides of the test specimen, and the output is an average of the two readings. Gauge lengths from 1 to 8 inches (25 to 200 mm) and measuring ranges from .050 to .250 inches (1.2 to 6 mm) are available. Download Data Sheet PDF
- MODEL 3442RA1 Miniature Averaging Axial Extensometers
With gauge lengths of 1 and 2 inches (25 and 50 mm) and measuring ranges of 0.050 and 0.100 inches (1.2 and 2.5 mm), the Model 3442RA1 was designed for applications where tensile or compressive strength tests on small rock, concrete and other small compression samples is desired. Download Data Sheet PDF
- Model 3544 Circumferential Extensometers
Designed for concrete and rock compression testing or for compression tests on other large samples. This model may be used simultaneously with the Model 3542RA axial extensometers. Download Data Sheet PDF
- Model 3909 Extensometers for Simple Performance Testing of Asphalt
Designed for measuring axial displacements in the simple performance tests prescribed by NCHRP Report 465, and determining dynamic modulus of hot mix asphalt per AASHTO TP062. Download Data Sheet PDF
- Model 3910 Extensometers for Creep Compliance and Tensile Strength Testing of Asphalt
Designed to many of the needs for testing asphalt core samples in 4 and 6 inch diameters. The unit meets test method requirements for strain measurement developed under the U.S. Federal Highways SHRP program. Download Data Sheet PDF
- MODEL 3911 Extensometers for Indirect Tensile Testing of Asphalt
Designed to meet many of the needs for testing asphalt core samples in 4 and 6 inch diameters. It meets test method requirements for strain measurement developed under the U.S. Federal Highways SHRP program. Download Data Sheet PDF
- MODEL 3975 Extensometers for Diametral Rock and Concrete Testing
Designed for accurate measurement of small diametral strains such as those required to determine Poisson’s ratio of rock, concrete and asphalt samples. The units are designed to be used in conjunction with the Model 3542RA axial averaging extensometer. Download Data Sheet PDF
