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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Heat Deflection Testing Machines

Cometech QC-656A Digital H.D.T. Heat Deflection Tester

Key Features

  • 6 Independent Test Stations: Enhances laboratory productivity by allowing up to six specimens to be tested simultaneously. Each station displays independent temperature and displacement data on the screen.

  • Smart Touch Screen Interface: Features a user-friendly touch panel that guides operators step-by-step through the standardized process, minimizing human error.

  • Automatic Weight Calculation: Simplifies setup by allowing users to enter specimen dimensions; the system then automatically calculates the required weights for the test.

  • Precise Temperature Control: Maintains a steady heating rate of 2°C per minute (adjustable) and supports high-temperature testing up to 300°C.

  • Automated Process & Cooling: Once the predefined deflection point is reached, the system records the temperature, stops heating, and activates the cooling system automatically.

  • Motorized Specimen Lifting: The specimen holders and weight frames feature an automatic rise and descend mechanism for safe and convenient specimen installation.

Technical Specifications

  • Conforming Standards: ASTM D648, ISO 75-1.

  • Temperature Range: Room temperature to 300°C.

  • Deflection Resolution: 0.001 to 3.000 mm.

  • Number of Stations: 6.

  • Flexion Span: 100 mm and 64 mm (Optional: 101.6 mm).

  • Oil Chamber Capacity: 25 Liters.

  • Dimensions: 48 x 110 x 125 cm | Weight: 230 kg (Empty); 250 kg (With oil).

  • Versatility: Specimen supports (R=3.0 mm) are compatible with optional Vicat softening point test heads.

Cometech QC-657B H.D.T. Heat Deflection Tester

Key Features

  • 3-Station Configuration: Designed with three independent testing stations, allowing for simultaneous testing of up to three specimens to improve lab throughput and data averaging.

  • 7-inch Color Touch Screen: An intuitive user interface that displays real-time test data for multiple samples and provides step-by-step guidance for operators.

  • Smart Calculation System: Automatically calculates the required weight for the test based on the specimen dimensions entered by the user, adhering to international standards.

  • Data Logging & Graphing: Fully records all test parameters and can convert raw data into visual graphs for easier analysis of thermal-deformation behavior.

  • Dual Testing Functionality: Versatile design allows for easy switching between Heat Deflection Temperature (HDT) and Vicat Softening Point tests by exchanging the testing jigs.

  • Water Cooling System: Features a cooling function to quickly lower the oil bath temperature after a test, significantly reducing downtime between cycles.

Technical Specifications

  • Conforming Standards: ASTM D648, ISO 75-1.

  • Temperature Range: Room temperature to 300°C.

  • Temperature Control: 2°C per minute increase.

  • Deflection Resolution: 0.001 to 3.000 mm.

  • Flexion Span: Max. 100 mm (Adjustable down to 50 mm).

  • Specimen Compatibility: Supports standard ASTM (127×12.7×6.35mm) and ISO specimen sizes.

  • Dimensions: 85 x 48 x 54 cm | Power: Single Phase 220V AC.

Testing Video

Cometech QC-661 Digital Vicat Heat Deflection Tester

Key Features

  • 6-Station High Productivity: Allows simultaneous testing of up to 6 specimens. The display shows independent temperature and LVDT displacement readings for each station.

  • Automated Specimen Handling: The specimen holder and weight frame automatically rise and descend, facilitating easy setup and reducing manual handling errors.

  • 7-inch Intuitive Touch Screen: User-friendly interface with illustration-guided steps, designed to minimize training time and operational mistakes.

  • Data Logging & Export: Completely records load and displacement data, with a convenient data export function to Excel for further professional analysis.

  • Smart Testing & Cooling: Once the 1mm penetration depth is reached, the system captures the Vicat Softening Temperature (VST), stops the test, and activates the cooling system.

  • Dual Functionality: Equipped with replaceable jigs, allowing the machine to switch between Vicat and HDT (Heat Deflection Temperature) testing.

Technical Specifications

  • Conforming Standards: ASTM D1525, ISO 306, GB/T T1633.

  • Temperature Range: Room temperature up to 300°C.

  • Temperature Control: 50°C per hour increase (Adjustable).

  • Test Loads: Method A: 10N (1 kg), Method B: 50N (5 kg).

  • Standard Indenter Tip: Ø1.13 mm pin.

  • Penetration Resolution: 0.001 to 3.000 mm.

  • Number of Stations: 6.

  • Dimensions: 48 x 110 x 125 cm | Weight: 230 kg (Empty); 250 kg (With oil).

Cometech QC-662B Vicat Heat Deflection Tester

Key Features

  • Smart Testing Interface: 7-inch touch screen displays real-time specimen temperature and LVDT displacement for each station, featuring illustration-guided operation to reduce errors.

  • Automatic Load Calculation: The system intelligently calculates the required test loads (1kg or 5kg), ensuring compliance with standards while simplifying the setup process.

  • Professional Data Management: Full recording of test parameters with the ability to export data to Excel for advanced analysis and reporting.

  • Efficient Cooling System: Equipped with a water cooling function to rapidly lower the oil bath temperature after a test, maximizing lab productivity.

  • Flexible Station Options: Available in 1, 2, or 3-station configurations to suit specific laboratory requirements and budgets.

  • Multi-Functional Design: Jigs are easily replaceable, allowing the machine to perform both Vicat Softening Temperature (VST) and Heat Deflection Temperature (HDT) tests.

Technical Specifications

  • Conforming Standards: ASTM D1525, ISO 75-1, ISO 306, JIS K7191-1, JIS K7206.

  • Temperature Range: Room temperature up to 300°C.

  • Temperature Control: Steady 50°C increase per hour (Adjustable).

  • Test Loads: Method A: 10N, Method B: 50N.

  • Indenter Diameter: Standard Ø 1 mm (1mm² cross-section).

  • Deflection Resolution: 0.001 to 3.000 mm.

  • Heat Equalization: Utilizes oil circulation flow for uniform temperature distribution throughout the chamber.

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