At Thermtest, we provide advanced solutions tailored to meet our client's diverse needs, ensuring high-quality, reliable measurements every time.
Selecting the appropriate laboratory equipment depends on various factors, including the material type, the desired accuracy, and the specific application requirements. Transient methods are ideal for quick and versatile assessments, especially for materials that are challenging to maintain at steady-state or require rapid analysis. Steady-state methods are more suitable for precise, controlled environments where accuracy is critical. Understanding these methods and their applications helps you choose the right approach for your needs.
Steady-state methods rely on establishing a constant temperature gradient across a material to measure its thermal conductivity. The process involves maintaining a uniform temperature difference and measuring the resultant heat flow, ensuring the sample reaches a thermal equilibrium where temperature remains constant over time. This approach is particularly effective for materials with achievable steady-state conditions and can provide highly accurate measurements. Variables such as radiative and convective heat losses or errors in sample thickness can affect accuracy, thus requiring a well-engineered laboratory instrument.
Transient methods assess a material's thermal properties by monitoring its response to temporary temperature changes. This dynamic testing technique involves introducing a heat pulse or a periodic heat source to the material and tracking the temperature response over time. A standard transient method is the Transient Hot-Wire (THW), used primarily for liquids, where a wire acts as a heat generator and a sensor. Similarly, the Transient Line Source (TLS) method is applied to solids like concrete or polymers using a needle probe that simultaneously heats the material and records temperature data. These methods are preferred for their rapid execution and versatility, accommodating a wide range of materials, including those that are challenging to test with other techniques.
The MP-1 with Transient Plane Source (TPS Method) and Temperature Platform (TPS-TP) is a laboratory instrument for testing absolute thermal conductivity, thermal diffusivity and specific heat of solids, pastes and powders over a broad temperature range.
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Temperature Range
The basic MP-1 with Transient Plane Source (TPS Method) can be configured for room temperature testing of absolute thermal conductivity, thermal diffusivity and specific heat of solids, pastes and powders.
Best for:
Standard Test Method
Temperature Range
The MP-1 with Transient Hot Wire (THW Method) and Temperature Platform (THW-TP) measuring instrument is designed to test absolute thermal conductivity, thermal diffusivity and specific heat of liquids, pastes and powders over a broad temperature range.
Best for:
Standard Test Method
Temperature Range
The basic MP-1 with Transient Hot Wire (THW Method) can be configured for room temperature testing of absolute thermal conductivity, thermal diffusivity and specific heat of liquids, pastes and powders.
Best for:
Standard Test Method
Temperature Range
The basic MP-1 can be used with both Transient Plane Source (TPS Method) and Transient Hot Wire (THW Method) for testing of absolute thermal conductivity, thermal diffusivity and specific heat of solids, liquids, pastes and powders.
Best for:
Standard Test Method
Temperature Range
The MP-V thermal conductivity instrument is the most versatile measurement platform with accurate methods for measuring solids, liquids, pastes and powders.
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The THW-L1 is an advanced thermal conductivity equipment for measuring the thermal properties of liquids and PCMs in accordance with ASTM D7896-19.
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HFM is a steady-state heat flow meter for testing insulation materials, construction materials, packaging, and assemblies.
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Designed to test the thermal resistance and thermal conductivity measurement of both homogeneous and heterogeneous materials such as metals, polymers, composites and pastes.
Best for:
Standard Test
Method
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