Zwick supplies extensometers for measuring deflection in 3 or 4-point flexure tests.

These digital displacement measuring systems are attached directly to the specimen. Extensometers for the 3-point flexure test are designed for flexure tests to ISO 178 on rigid and semi-rigid plastics, those for the 4-point flexure test comply with DIN 53457.

• Easy to operate.
• Direct on-specimen measurement.
• Highly accurate E-modulus determination.
• Optionally available with motorized application unit and increased resolution.