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EXTENSOMETERS

2.4

The precise measurement or control of specimen deformation is a fundamental requirement in many materials tests. The use of crosshead or actuator movement to derive specimen deformation is often employed, but accuracy is limited by external influences such as system compliance and specimen deformation outside the nominal gauge length (in the tab ends for example). Extensometry provides a direct and accurate method for measuring and controlling specimen deformation by monitoring strain over a precisely defined gauge length. The Instron extensometry range includes many different types of extensometers to suit various specimens and applications. Each one is designed to provide the best possible accuracy. Instron has designed many custom extensometers and will discuss your extensometry requirements should you be unable to find a suitable device in the following pages. ÂŽ

Automatic Extensometers

80

Biaxial Automatic Extensometers

81

Averaging Axial Clip-on Extensometers

82-83

Dynamic Axial Clip-On Extensometer

84-85

Static Axial Clip-On Extensometers

86-88

LVDT Non-Separable Axial Clip-On Extensometers

89-91

Biaxial Clip-On Extensometers

92-93

Circumferential Extensometers

94

Connecting Cables for Extensometers 95 Crack Opening Displacement (COD) Gauges

96

Deflectometers

97-98

Deflectometer Accessories

99

High-Temperature Extensometers

100-105

LVDT and SLVC Units

106

Long-Travel Extensometers

107

Non-Contacting Video Extensometers 108-109 Digital Image Correlation

110-111

Knife Edges, Clips and Parts for Extensometers

112-113

Transverse Clip-On Extensometers

114

Profile for Instron

Instron - Accessories for Materials Testing - Seventh Edition