Products

Lb-CY Refractory Material Load-Softening Creep Temperature Tester (Differential Heating Method)

This instrument is used to evaluate the resistance of refractory materials to softening under high‑temperature load, serving as an important indicator of their high‑temperature mechanical properties. It features automated testing and data processing, automatically generating and saving temperature–deformation curves.

Lb-DC2A Hollow Vacuum Glass U-Value Heat Transfer Coefficient Tester

Both measurement and control are computer‑controlled, enabling fully automated instrument operation. The system is applicable to manufacturers of insulating glass materials, relevant quality inspection agencies, institutions, as well as research institutes and universities.

Lb-DC2 Hollow Vacuum Glass U‑Value (K‑Value) Thermal Transmittance Tester

Both measurement and control are computer‑controlled, enabling fully automated operation of the instrument. This device is primarily used to determine the U‑value (K‑value) of insulating glass units, but it can also be employed for measuring the thermal conductivity of other insulation materials.

Lb-DH30 Single-Plate Thermal Conductivity Tester (Guarded Hot Plate Method)

The instrument is based on the principle of one‑dimensional steady‑state heat conduction. When the upper and lower surfaces of the sample are maintained at different steady temperatures, it measures the heat flux through the sample’s effective heat‑transfer area, as well as the temperature difference and thickness between the two surfaces, thereby calculating the thermal conductivity. It meets the high‑precision testing requirements of material‑testing research laboratories and is primarily used to evaluate the thermal conductivity of plastics, glass, fibers, foams, insulation materials, and more. It is widely employed in material analysis and testing across universities, research institutions, quality‑inspection agencies, and manufacturing plants.

Lb-DH500D Thermal Insulation Material Camping Mattress Thermal Resistance and Thermal Conductivity Tester (Guarded Hot Plate Method)

Lb-DH500D Thermal Insulation Material Camping Mattress Thermal Resistance and Thermal Conductivity Tester. This instrument employs the guarded hot plate method and comprises a hot‑plate temperature control system, a calorimetric power control system, a cold‑plate temperature control system, a specimen clamping system, and a computer‑based data acquisition and control system. It is primarily used to measure the thermal conductivity and thermal resistance of materials such as plastics, glass, fibers, foams, cellular cement, insulation materials, and camping mattresses.

Lb-DH600 Single-Plate Thermal Conductivity Tester (Guarded Hot Plate Method)

The Lb-DH600 single‑plate thermal conductivity tester is based on the principle of one‑dimensional steady‑state heat conduction. When the upper and lower surfaces of the sample are maintained at different steady temperatures, it measures the heat flux through the sample’s effective heat‑transfer area, as well as the temperature difference and thickness between the two surfaces, to calculate the thermal conductivity. This instrument meets the high‑precision testing requirements of material‑testing and research laboratories, and is primarily used for plastics, glass, fibers, foams, insulation materials, and more. It is widely employed in material analysis and testing across universities, research institutes, quality‑inspection agencies, and manufacturing facilities.

Lb-DJ2 High-Temperature Thermal Conductivity Meter for Metallic Materials

The Lb-DJ2 High-Temperature Thermal Conductivity Meter for Metallic Materials employs the direct‑current longitudinal heat‑flow method and is suitable for measuring the thermal conductivity of metals in the temperature range of 80° to 900°C, provided no phase transformations occur. The measurement process is fully automated by a computer, thereby meeting the testing requirements of materials‑testing and research laboratories for the thermal conductivity of metallic materials.

Lb-DL2 Series Thermal Conductivity Tester for Plastics, Rubbers, Graphite, and Insulation Materials (Guarded Hot Plate Method)

This instrument employs the internationally popular heat‑flow meter method for determining thermal conductivity, coupled with a computer to enable fully automated measurements, thereby meeting the testing requirements for the thermal conductivity of a wide range of common materials. Based on the steady‑state plane‑plate method, it maintains a constant temperature on the hot face, allowing heat to transfer through the sample to the cold face; the heat flux is then measured, and, together with the sample’s thickness and cross‑sectional area, the thermal conductivity and thermal resistance can be calculated. This testing approach is simple, rapid, and highly repeatable, making it ideally suited for research and development in the field of heat transfer. It is applicable to materials such as plastics, rubbers, graphite, and insulation products, and finds extensive use in universities, research institutes, quality‑inspection agencies, and industrial enterprises.

Lb-DL300A Thermal Insulation Material Thermal Conductivity Tester (Guarded Hot Plate Method)

This instrument is primarily used to measure the thermal conductivity of homogeneous, plate‑like materials such as plastics, rubber, glass, fiberboard, polystyrene boards, extruded polystyrene boards, aerated concrete, hollow glass, wood panels, and various insulation materials. It can also determine the thermal conductivity of granular, bulk, and soft materials. When equipped with a protective measurement‑control unit, it effectively mitigates environmental influences, ensuring high measurement accuracy and repeatability.

Lb-DL300 Thermal Insulation Material Thermal Conductivity Tester (Guarded Hot Plate Method)

This instrument employs the internationally popular heat‑flow meter method for measuring thermal conductivity, coupled with a computer to enable fully automated testing, thereby meeting the requirements for determining the thermal conductivity of a wide range of common materials. Based on the steady‑state plane‑plate method, it maintains a constant temperature on the hot side, allowing heat to conduct through the sample to the cold side; the heat flux is then measured, and, together with the sample’s thickness and cross‑sectional area, the thermal conductivity and thermal resistance can be calculated. This testing approach is simple, rapid, and highly repeatable, making it ideally suited for research and development in the field of heat transfer. It is applicable to materials such as plastics, rubbers, graphite, and insulation products, and finds extensive use in universities, research institutes, quality‑inspection agencies, and industrial enterprises.

Lb-DL600 Thermal Insulation Material Thermal Conductivity Tester (Guarded Hot Plate Method)

This instrument employs the internationally popular heat‑flow meter method for measuring thermal conductivity, coupled with a computer to enable fully automated testing, thereby meeting the requirements for determining the thermal conductivity of a wide range of common materials. Based on the steady‑state plate method, it maintains a constant temperature on the hot side, allowing heat to flow through the sample to the cold side; the heat flux is measured, and, together with the sample’s thickness and cross‑sectional area, the thermal conductivity and thermal resistance can be calculated. This testing approach is simple, rapid, and highly repeatable, making it ideally suited for research and development in the field of heat transfer. It is applicable to materials such as plastics, rubber, graphite, and insulation products, and is widely used in universities, research institutes, quality‑inspection agencies, and industrial enterprises.

Lb-DM2 Thermal Performance Thermal Conductivity Meter (Touchscreen)

The Lb-DM2 thermal‑property thermal conductivity meter is designed to determine the thermal conductivity, heat storage coefficient, thermal diffusivity, and specific heat of homogeneous plate‑like, gel‑like, powdered, and granular materials under dry conditions or at various moisture contents. The measured materials exhibit thermal conductivities ranging from 0.035 to 1.7 W/m·K and heat storage coefficients from 0.1 to 30 W/m²·K. The thermophysical properties of a material are influenced by numerous factors, including its chemical composition, density, temperature, and moisture content; among these, moisture has a particularly significant impact. In practical applications, due to environmental conditions, construction‑related moisture, manufacturing processes, and service‑condition effects, materials often contain a certain level of moisture, which can degrade their thermal insulation performance. Therefore, this factor must be accounted for in thermal calculations. Consequently, it is essential to accurately measure the thermophysical properties of materials under moist conditions.

Lb-DP2 Thermal Conductivity Tester (Economical Plate Steady-State Method)

Methods for measuring thermal conductivity are broadly classified into steady-state and transient techniques. The Lb‑DP2 thermal conductivity tester employs the steady-state method to determine the thermal conductivity of various materials; its design is clear and straightforward, and its experimental approach is both representative and practical. Measuring the thermal conductivity of materials is a key component of thermal physics experiments. This instrument comprises a heater, a digital temperature display, a digital timer, and other components, all integrated into a single unit.

Lb-DR8 High-Precision Thermal Interface Resistance and Thermal Conductivity Tester (Heat Flux Method)

The Lb-DR8 high-precision thermal‑resistance and thermal‑conductivity tester is designed to measure the thermal resistance of thin thermal conductors, thermally conductive silicone sheets, thermally conductive resins, beryllium oxide ceramics, alumina ceramics, and other small‑dimensional materials, as well as the contact thermal resistance at solid interfaces and the thermal conductivity of these materials. The test specimens are typically solid, sheet‑like samples; with an optional frame, powdered or paste‑like materials can also be tested. The instrument features automatic pressure application, automatic thickness measurement, and fully computer‑controlled automated measurement. It is widely used for thermal analysis and material testing in universities and colleges, research institutions, quality‑inspection agencies, and manufacturing plants.

Lb-DRV Multifunctional Thermal Conductivity Tester for Solid Insulating Materials (Hot‑Flow Method)

Lb-DRV Multifunctional Solid Insulation Material Thermal Conductivity Tester This instrument is primarily used to measure the thermal resistance of thin thermal conductors, thermally conductive silicone sheets, thermally conductive resins, beryllium oxide ceramics, alumina ceramics, and other small‑size materials, as well as the contact thermal resistance at solid interfaces and the thermal conductivity of the materials themselves. The test specimens are typically solid, sheet‑like samples; with an appropriate frame, powdered or paste‑like materials can also be tested. Reference standards include: MIL‑I‑49456A (for insulating sheets, thermally conductive resins, and thermally conductive glass‑fiber‑reinforced materials); GB 5598‑2015 (method for determining the thermal conductivity of beryllium oxide ceramics—rod‑axis method); ASTM D5470‑12 (standard test method for thermal performance of thin, thermally conductive solid electrical insulating materials); GB/T 38712‑2020 (test method for the thermal conductivity of ultra‑thin glass—heat‑flow method); and GB/T 29313‑2012 (test method for the thermal conductivity of electrical insulating materials).

Lb-DX3A Hot-Wire Method Thermal Conductivity Meter (Cross‑Line and Parallel‑Line Methods)

The Lb-DX3A Hot-Wire Thermal Conductivity Meter employs the transient hot-wire method, including both the cross‑wire and parallel‑wire techniques, to measure the thermal conductivity, thermal diffusivity, and specific heat capacity of solid and powdered materials over a range of temperatures. It features high accuracy, high resolution, and excellent reproducibility, with automated measurements controlled by a computer. This instrument is widely used in research institutions, quality‑control laboratories, and industrial facilities for determining the thermal conductivity of materials, offering improved measurement precision and repeatability, a more rational design, and greater ease of use.

Lb-DX3A Hot-Wire Method Thermal Conductivity Meter (Cross‑Line and Parallel‑Line Methods)

The Lb-DX3A Hot-Wire Thermal Conductivity Meter employs the transient hot-wire method, including both the cross‑wire and parallel‑wire techniques, to measure the thermal conductivity, thermal diffusivity, and specific heat capacity of solid and powdered materials over a range of temperatures. It features high accuracy, high resolution, and excellent reproducibility, with automated measurements controlled by a computer. This instrument is widely used in research institutions, quality‑control laboratories, and industrial facilities for determining the thermal conductivity of various materials, enhancing measurement precision and repeatability while offering a more rational design and greater ease of use.

Lb-DX3B Refractory Material Thermal Conductivity Tester Using the Hot-Wire Method (Parallel-Line Technique)

The Lb-DX3B thermal conductivity meter for refractory materials employs the transient hot‑wire method, including both the cross‑wire and parallel‑wire techniques, to measure the thermal conductivity, thermal diffusivity, and specific heat capacity of solid and powdered materials over a range of temperatures. It features high accuracy, high resolution, and excellent reproducibility, with automated measurements controlled by a computer. This instrument is widely used in research institutions, quality‑control laboratories, and industrial facilities for determining the thermal properties of materials, offering improved measurement precision and repeatability, a more rational design, and greater ease of use.

Lb-BR3 Specific Heat Capacity Tester (Split-Type)

This specific heat capacity measurement apparatus employs the cooling method to determine the specific heat capacities of both solid and liquid materials. Given the heterogeneous nature of geotechnical and similar samples, sufficient attention has been paid to ensuring the representativeness of the sampled material. A thermocouple is inserted at the center of the sample to accurately monitor the heat transfer process; by comparing its readings with those of a water‑temperature thermocouple, it is possible to ascertain whether thermal equilibrium has been reached. The device incorporates high‑precision temperature‑sensing thermocouples and a dedicated temperature‑measuring instrument, thereby guaranteeing the accuracy of the measurements.

Lb-RY2 Glass Softening Point Tester

This instrument employs the wire‑drawing method to determine the softening point of glass, in accordance with the reference standard JC/T 751‑1996, “Test Method for Softening Point of Quartz Glass (Wire‑Drawing Method).”

Lb-RY2 Foam Glass Thermal Diffusivity Meter

This instrument is designed and manufactured in accordance with the JGT 469 test method for determining the thermal diffusivity of foam glass. It employs a computer‑based interface to acquire, process, display, and print measurement data. The device measures the thermal diffusivity of materials by means of a cooling‑down approach and is widely used in manufacturing enterprises, quality‑inspection agencies, higher education institutions, and research institutes. Operating principle: After raising the sample temperature to a specified level and allowing it to reach thermal equilibrium, the thermal diffusivity is calculated from the sample’s cooling rate at that stable temperature.

Lb-SG Glass Crystallization Electric Furnace

Because glass has a higher internal energy than a crystalline material of the same composition, it exists in a metastable state and, under certain conditions, exhibits a tendency to undergo spontaneous crystallization. This phenomenon is known as devitrification, also referred to as loss of transparency or anti‑glassification. Determining the crystallization behavior of glass involves measuring its crystallization temperature range—both the upper and lower limits—as well as the degree of crystallization within that range. Based on these results, appropriate melting, forming, and thermal‑processing regimes can be established to prevent crystallization and produce transparent, high‑quality glass products. This instrument employs the gradient furnace method to assess glass crystallization properties and is widely used in industrial settings, educational institutions, and research laboratories for analyzing and testing the crystallization characteristics of glass and other non‑metallic materials. Such analyses provide valuable guidance for optimizing production processes and shaping techniques.

LBT-DR2A Liquid and Fluid Thermal Conductivity Tester

The LBT-DR2A liquid thermal conductivity tester employs the transient hot‑wire method and is primarily used to measure the thermal conductivity of liquids. It features rapid measurement, minimal sample requirements, high accuracy, high resolution, and excellent reproducibility. Automated measurements are controlled by a computer. This instrument is widely applicable for determining the thermal conductivity of working fluids in industries such as petroleum, chemical processing, biotechnology, pharmaceuticals, energy, and power engineering.

LBT-DR2B Thermal Conductivity Tester (Transient Plane Source Method, Small Probe)

The LBT-DR2B thermal conductivity tester employs the transient probe method and is suitable for measuring the thermal conductivity of high-viscosity fluids, gels, particulate materials, powders, and similar substances. By combining the hot-wire method with the probe method, this instrument not only ensures measurement accuracy but also significantly enhances portability. Users simply insert the probe into the sample and obtain its thermal conductivity through straightforward software operations, making it particularly well suited for testing soft materials, finished products of irregular shapes, and field measurements. Reference standard: ASTM D5334‑2014, Standard Test Method for Thermal Conductivity of Soils and Soft Rocks by the Hot‑Wire Probe Method.

LBT-DR2C Solid and Thin-Film Thermal Conductivity Tester (Transient Plane Source Method)

The LBT-DR2C thermal conductivity tester (transient plane source method) is primarily used to measure the thermal conductivity of solids, powders, coatings, thin films, anisotropic materials, and more. This instrument is based on TPS transient plane source technology and employs a Hot Disk probe for thermal conductivity measurement. Reference standards include ISO 22007‑2:2008, “Methods for the determination of thermal conductivity and thermal diffusivity.”

LBT-DR2D Soil and Soft Rock Deep Thermal Conductivity Tester (Transient Probe Method, Large Probe)

LBT-DR2D Thermal Conductivity Tester (Transient Plane Source Method, Large Probe), suitable for measuring the thermal conductivity of high-viscosity fluids, liquids, gels, granular materials, powders, and other substances. This instrument combines the hot-wire method with the probe method, ensuring measurement accuracy while significantly enhancing portability. Users simply insert the probe into the sample and obtain its thermal conductivity through straightforward software operations, making it particularly well-suited for on-site measurements. Reference standard: ASTM D5334-2014, Standard Test Method for Thermal Conductivity of Soils and Soft Rocks by the Hot-Wire Probe Method. Computer: 1 unit (configured according to contract).

LBT-DR2G Low‑Thermal‑Conductivity Material Thermal Conductivity Tester (Transient Hot‑Wire Method)

The LBT‑DR2G low‑thermal‑conductivity material thermal conductivity tester (transient hot‑wire method) employs a single‑wire sensor and is designed to measure powders and solid bulk materials, particularly low‑thermal‑conductivity insulation materials. The heating wire serves both as the heating element and the temperature‑sensing element. A key feature of this sensor is that the hot wire is attached directly to the insulating material; due to its extremely fine diameter, it is well suited for measuring lightweight materials with low heat capacity and low thermal conductivity. However, because the hot wire is bare and the conductive material cannot be measured directly, special precautions are required. Reference standard: ASTM D5334‑2014, “Standard Test Method for Thermal Conductivity of Soils and Soft Rocks by the Hot‑Wire Probe Method.”

Lb-XY2 Heat Storage Coefficient Tester

The Lb-XY2 thermal storage coefficient tester is suitable for determining the thermal conductivity, thermal storage coefficient, thermal diffusivity, and specific heat of homogeneous plate‑like, gel‑like, powdered, and granular materials under dry conditions or at various moisture contents. The thermal conductivity of the test material ranges from 0.035 to 1.7 W/m·K, while the thermal storage coefficient spans 0.1 to 30 W/m²·K.

Lb-ZY3-1000 High-Temperature Vertical Dilatometer (Rod-Type Glass-Vial Dilatometer)

This instrument is used to determine the thermal expansion and contraction behavior of metallic materials, ceramics, glass, glazes, refractory materials, as well as glass containers such as ampoules and vials, during heating and firing.

Lb-ZY196 Thermal Expansion Coefficient Tester for Metallic and Non-Metallic Materials (−196°C Low-Temperature Range)

This instrument is suitable for measuring the volumetric changes—expansion and contraction—of metallic materials, ceramics, glazes, refractory materials, as well as non-metallic materials such as rubber and plastics, over a temperature range from −196°C to +200°C.