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Versatile measurement platform with accurate methods for thermal conductivity, thermal diffusivity, specific heat and thermal effusivity of solids, liquids, pastes and powders.
Transient methods share similar theory with differences that are specific to their primary design.
The sensors are electrically connected to a power supply and sensing circuit. A current passes through the sensors and creates an increase in temperature, which is recorded over time. The heat generated is then diffused into the sample at a rate dependent on the thermal transport characteristics of the material.
Intelligent transient design for automation of testing and analysis. Raw data is always available to empower understanding of your results. Name your sample, iTransient does the rest.
The TPS (Hot Disc) sensor is comprised of a double-spiral of nickel encapsulated between layers of insulation.
There are two options for operation of the sensor. The standard operation is two-sided, where the sensor is placed between two pieces of the same sample. The expanded use is a single-sided sensor, which only requires one piece of sample.
Isotropic
Optional: anisotropic, slabs, thin-films and coatings
The THW sensor consists of a replaceable thin heating wire secured to specially designed sensor.
Measurements are done at short test times (one second) to limit convective effects on samples with a wide range of viscosities.
*Optional sensor
The absolute version of the MTPS sensor is comprised of a TPS (Hot Disc) sensor configured with known backing insulation, permanently housed in a rugged single-sided configuration.
This unique design combines intelligent design of sensor and measurement capabilities to generate bulk and directional properties for all materials.
*Optional sensor
The TLS sensor consists of a thin heating wire and temperature sensor sealed in a steel tube. The sensor is completely inserted into the sample to be tested.
Methods | TPS | THW | MTPS | TLS | THW-L |
|---|---|---|---|---|---|
Materials | Solids, pastes and powders | Liquids | Solids, pastes and powders | Soil and polymers | Liquids and PCMs |
Thermal conductivity (W/m·K) | 0.01 to 100 / 500 | 0.01 to 2 | 0.03 to 100 / 500 | 0.1 to 8 | 0.01 to 2 |
Thermal diffusivity (mm²/s) | 0.01 to 50 / 300 | Up to 0.5 | 0.01 to 50 / 300 | N/A | Up to 0.5 |
Specific heat (J/kg-K) | Up to 5 | Up to 5 | Up to 5 | N/A | Up to 5 |
Thermal effusivity (W√s/m²K) | 20 to 20000 / 40000 | N/A | 20 to 20000 / 40000 | N/A | N/A |
Temperature (°C)* | Room temperature or -75 to 300 | Room temperature or -50 to 100 | -50 to 200 | -40 to 100 | 0 to 100 |
Accuracy | 5% | 2% | 5% | 5% | 2% |
Repeatability | 1 to 2% | 1% | 2% | 2% | 1% |
Smallest dimension** | 10mm x 10mm to unlimited | 20 ml | 25mm x 25mm to unlimited | 50mm to unlimited | 20 ml |
Sample thickness (mm)** | 0.05 to unlimited | N/A | 0.1 to unlimited | 100 to unlimited | N/A |
Standard | ISO 22007-2:2022, ISO 22007-7:2023, GB/T 32064-2015 | ASTM D7896-19 | ISO 22007-7:2023 | ASTM D5334-22a, ASTM D5930-17, IEEE 442-2017 | ASTM D7896-19 |
Methods | TPS | THW |
|---|---|---|
Configuration | Symmetric (two-sided) and Asymmetric (single-sided) | Wire immersed |
Materials | Solids, pastes and powders | Liquids & PCMs |
Thermal conductivity (W/mK) | 0.01 to 500 | 0.01 to 2 |
Thermal diffusivity (mm²/sec) | 0.01 to 300 | up to 0.5 |
Specific heat (MJ/m³K) | Up to 5 | up to 5 |
Thermal effusivity (W√s/(m²K)) | 20 to 40000 | N/A |
Temperature (°C) | Room Temp or -75 to 300°C | Room Temp or -50 to 100°C |
Accuracy (%) | 5 | 2 |
Repeatability (%) | 1 | 1 |
*Smallest dimension (mm) | 10 x 10 to unlimited | 20 ml |
*Sample thickness (mm) | 0.05 to unlimited | N/A |
Standard | ISO 22007-2, GB/T 32064 | ASTM D7896 |
*Based on testing module used.
Methods | MTPS | TLS |
|---|---|---|
Configuration | Asymmetric (single-sided) | Needle inserted |
Materials | Solids, pastes and powders | Soils and polymers |
Thermal conductivity (W/mK) | 0.03 to 500 | 0.1 to 8 |
Thermal diffusivity (mm²/sec) | 0.01 to 300 | N/A |
Specific heat (MJ/m³K) | Up to 5 | N/A |
Thermal effusivity (W√s/(m²K)) | 20 to 40000 | N/A |
Temperature (°C) | -50 to 200°C | -40 to 100°C |
Accuracy (%) | 5 | 5 |
Repeatability (%) | 2 | 2 |
*Smallest dimension (mm) | 25 x 25 to unlimited | 50 to unlimited |
*Sample thickness (mm) | 0.1 to unlimited | 100 to unlimited |
Standard | N/A | ASTM D5334, ASTM D5930, IEEE-442 |
*Based on testing module used.
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