Established in 1994, Cometech Testing Machines, Taiwan’s best quality control instrument manufacturer, which has invested in product development, design and manufacturing for a long time. The quality and function of our products continue to update and improve. We have a team of engineers with software and hardware R&D capabilities. In Taiwan, we are the pioneer of QC instrument industry. We are also the largest instrument manufacturer in Taiwan and have our own R&D center.
 
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Extensometer ⇓

Cometech QC-551 Long Extensometer

Key Features

  • Designed for High-Elongation Materials: Specifically engineered for measuring the elongation of materials such as rubber, soft plastics, films, and elastomers.

  • High Precision Measurement: Utilizes a high-resolution optical encoder to track specimen deformation directly, providing far more accurate data than crosshead travel measurements.

  • User-Friendly Clip-on Design: Features lightweight and easy-to-attach grips that ensure a firm hold on the specimen without causing damage or slippage during the test.

  • Seamless Integration: Fully compatible with Cometech Universal Testing Machines and software for generating precise Stress-Strain curves and technical reports.

Technical Specifications

  • Maximum Travel: 800 mm (Extended travel models available upon request).

  • Resolution: 0.05 mm.

  • Gauge Length: Adjustable based on testing standards (e.g., 10, 20, 25, 50 mm).

  • Sensor Type: High-precision Optical Encoder.

  • Grip Mechanism: Balanced arm design to accommodate various specimen thicknesses.

Applications

  • Rubber Industry: Measuring the elongation and elasticity of natural and synthetic rubber.

  • Plastic Industry: Testing the tensile properties of stretch films, plastic bags, and soft polymers.

  • Research & Development (R&D): Analyzing the deformation behavior and ductility of advanced elastomeric materials.

Cometech QC-557 (Short Extensometer)

Key Features

  • Optimized for Rigid Materials: Purpose-built for measuring deformation in metal, hard plastics, and composites with low elongation characteristics (<100%).

  • Ultra-High Resolution: Delivers 0.5 μm resolution, enabling high-precision capture of displacement for accurate Modulus and Yield Point determination.

  • Test to Fracture: Robust design allows the extensometer to remain clamped on the specimen for the full duration of the test including break, with no need for mid-test removal.

  • Switchable Gauge Length: Features a versatile design with two switchable gauge lengths (25 mm and 50 mm) in a single unit, meeting various testing standards without extra accessories.

  • Reliable Clamping Mechanism: Equipped with adjustable clamping force and interchangeable jaw faces suitable for both flat specimens (0-22mm thick) and rod specimens (Ø6-22mm).

Technical specifications

  • Gauge Length: 25 mm / 50 mm (Switchable).

  • Max. Elongation: 100% (at 25mm GL) / 50% (at 50mm GL).

  • Resolution: 0.5 μm.

  • Specimen Compatibility: Flat (0-22mm thickness) and Round (Ø6-22mm diameter).

  • Operating Temperature: 0°C ~ 70°C.

  • Compatibility: Seamlessly integrates with Cometech Universal Testing Machines and other leading UTM brands.

Applications

  • Metal Industry: Measuring elongation of steel, aluminum, and metallic wires.

  • Engineering Plastics: Testing high-rigidity polymers according to ISO 527, ASTM D638, and ASTM E8 standards.

  • Material Analysis: Precise determination of Young’s Modulus, proof stress, and strain-hardening behavior.

Testing Video ⇓

Head Office :
107/69 Moo 6, Khu Khot, Lam Luk Ka District, Pathum Thani 12130

E-mail : [email protected]
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