Rugged clip-on extensometers with gage lengths from 0.5 - 2 inches (and 10 - 50 mm) and measuring ranges from 5% to 100% strain are available. A wide range of materials, including metals, plastics, composites and ceramics can be tested. All models work in both tension and compression. All standard units meet existing ASTM class B-1 and ISO 9513, class 0,5 requirements for accuracy.