Heat Seal Tester LHST-A11 offers a wide range of heat-sealing temperature from RT to 300℃. It supports both single and double-segment testing, making it highly versatile. This tester is able to simultaneously test up to five different temperature segments. The sealing process occurs under a controlled temperature, pressure, and time to mimic real production conditions. Our tester is suitable to determine the optimal heat-sealing parameters for various plastic film substrates, flexible packaging films.
| Heat Sealing Temperature | RT to 300℃ |
| Temperature Control Accuracy | ± 1℃ (0.1℃ customizable) |
| Heat Sealing Time | 0.01 s to 99.99 h |
| Heat Sealing Pressure | 0 to 8 kg (0 to 0.8 MPa) |
| Heat Sealing Surface | Lower sealing tool: (35 × 10 mm)× 5 segments Upper sealing tool: customizable with silicon pad |
| Heat Sealing Heating Form | Double heating |
| Operating Mode | Automatic and manual |
| Power Supply | AC 220 V, 50 Hz |
| Dimension | 700 × 400 × 540 mm |
Dual operating mode
High heat sealing efficiency
Adjustable sealing time and pressure
Compact and durable design
High-precision components
Three-axis external cylinder
Our Heat Seal Tester LHST-A11 is used in food, pharmaceutical, and packaging industries to evaluate the heat sealing temperature, pressure, and time of plastic films, composite films, and coated materials. It ensures quality control, material research, and compliance with industry standards for flexible packaging.
Foot switch × 1
Power cord ×1
Note: User must ensure an air source for Heat Seal Tester LHST-A11.
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Heat Seal Tester LHST-A11 Catalog
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Heat Seal Tester LHST-A11 Manual
Available Range :
Heat Seal Tester LHST-A10 : RT to 300℃
Labtron Plastic Testing Instruments has a microprocessor-controlled PID system that ensures precise temperature balance for consistent results. These include an inside chamber constructed from durable stainless steel, offering long-lasting reliability. Their test samples retain their physical properties even after aging, ensuring accurate assessments. They have adopted a double-pipe structure for enhanced durability and performance. Our plastic testing instruments effectively determine the anti-impact properties of materials, providing valuable data for material testing and quality control.








Yes, the Heat Seal Tester is highly versatile and can test a wide range of materials, including plastic film substrates, flexible packaging composite films, coated paper, and aluminum foil. Since different materials have unique melting points and sealing requirements, the device’s customizable temperature, pressure, and sealing time settings make it adaptable for various industrial applications.
Our Heat Seal Tester is a valuable tool for R&D laboratories working on developing new packaging materials. By simulating real-world sealing conditions, researchers can study how different materials respond to heat sealing and optimize their properties for durability, sustainability, or cost-effectiveness. It is particularly useful for testing eco-friendly and biodegradable packaging materials, ensuring they meet industry standards while maintaining seal integrity.
Safety is a priority in heat-sealing devices, especially when operating at high temperatures. Labtron’s Heat Seal Tester is designed with precise temperature control, preventing overheating that could damage materials or pose safety risks. The external cylinder design ensures controlled pressure application, reducing the risk of sudden pressure fluctuations. Furthermore, the foot switch operation allows users to safely control the sealing process without direct hand contact with the heated parts.
Labtron’s Heat Seal Tester utilizes a double-heating system, where both the upper and lower heating elements apply controlled heat to the test material. This system ensures uniform heat distribution, leading to consistent sealing results. The lower heating tool measures 35×10mm, while the upper tool features up to five customizable segments for multi-temperature testing. The double-heating mechanism enhances efficiency and ensures that both sides of the material achieve the necessary temperature for a strong bond.
The heat sealing properties of packaging materials directly affect the integrity and shelf life of packaged products. Temperature determines how well the material melts and fuses together, pressure ensures proper adhesion, and time controls the duration of heat exposure to achieve a strong bond. If any of these factors are not optimized, the packaging may develop weak seals, leading to contamination, leakage, or product degradation. Our Heat Seal Tester allows manufacturers and researchers to fine-tune these parameters for the best sealing performance.
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Labtron Equipment Ltd., Quatro House, Lyon Way, Camberley, Surrey GU16 7ER United Kingdom
Email: info@labtron.com Whatsapp: +44 73 4441 2688 Phone: +44 2080 043608