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Transient Plane Source (TPS-3)

A transient plane source (TPS-3) for testing the thermal conductivity, thermal diffusivity and specific heat of solids, pastes and powders for customers with a limited budget.

Best For Solids, Powders and Pastes

Transient Plane Source

Test Method

10 °C to 80 °C

Temperature
Range

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TPS-3 Transient Plane Source

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Features

We have designed the transient plane source (TPS-3) for testing the thermal conductivity, thermal diffusivity and specific heat of solids, pastes and powders for customers with a limited budget. The TPS-3 includes the standard TPS Sensor and software for use in combination with the Keithley 2400/2401 Source Meter. The TPS-3 can be offered as a package with a Keilthley meter or for use on your own Keithley meter.

The basic theory is that the sensor, which is sandwhiched between two pieces of the same sample, is electrically connected to a power supply and sensing circuit. A current passes through the sensor 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.

TPS-3 Features

  • Thermal conductivity, thermal diffusivity, and volumetric specific heat
  • Portable, Economical, and Accurate
  • Solids, Pastes, and Powders
  • No calibration or contact agent
Specification
Materials Solid, Pastes, and Powders
Measurement Capabilities Bulk Properties
Thermal Conductivity 0.03 to 70 W/m•K
Additional Properties Thermal Diffusivity and Specific Heat
Measurement Time 10 to 160 seconds
Temperature Range 10 to 80 °C
Reproducibility Typically better than 2%
Accuracy Typically better than 5%
Sensor Diameter 20 mm
Smallest Sample Size 40 mm diameter x 5 mm
Largest Sample Size Unlimited

Testing Sensors and Applications
Standard TPS Sensor
Standard TPS Sensor

Standard 20 mm diameter TPS Double Spiral Sensor (Model 46171).

Thermal Conductivity of Insulation
Thermal Conductivity of Insulation

Room temperature measurement of NIST EPS 1453 was 0.032 W/m·K, RSD 0.65%, compared to expected value of 0.0332 W/m·K. Accuracy of 3.6%.

Thermal Conductivity of Glass
Thermal Conductivity of Glass

Room temperature measurement of Pyrex Glass was 1.17 W/m·K, RSD 1.5%, compared to expected value of 1.15 W/m·K. Accuracy of 1.7%.

Thermal Conductivity of Stainless Steel
Thermal Conductivity of Stainless Steel 316

Room temperature measurement of Stainless Steel 316 was 13.81 W/m·K, RSD 1.2%.

Transient Plane Source (TPS) Models Comparison

Models
Thermal Conductivity
Additional Properties
Measurement Time
Sample Size*
Reproducibility
Accuracy
Temperature Range
Optional Sensors
Standards
iTPS Parameter Automation
Single-Sided
MP-1 with TPS
0.005 to 2000 W/m•K
Thermal Diffusivity, specific heat, thermal effusivity, thermal contact resistance and thermal resistance
0.25 to 2560 seconds
5 mm diameter x 0.01 mm height to unlimited
1%
3%
-160 to 1000 °C
THW, TLS, MTPS, THS
ISO 22007-2, ISO 22007-7,
GB/T 32064
Yes
Yes
MP-V with TPS
0.01 to 100 / 500 W/m•K
Thermal diffusivity, specific heat and thermal effusivity
2 to 160 seconds
10 mm diameter x 0.05 mm height to unlimited
1 to 2%
5%
-75 to 300 °C
THW, TLS, MTPS
ISO 22007-2, ISO 22007-7,
GB/T 32064
Yes
Yes | MTPS (Ø 12.8 mm)
TPS-3
0.03 to 70 W/m•K
Thermal diffusivity and specific heat
10 to 160 seconds
40 mm diameter x 5 mm height to unlimited
2%
5%
10 to 80 °C
N/A
N/A
N/A
N/A
MP-2 with TPS-4
0.03 to 5 W/m•K
N/A
10 to 40 seconds
25 mm diameter x 5 mm height to unlimited
2%
5%
10 to 40 °C
THW, TLS
N/A
N/A
Yes
*Dependent on module in the end of the table

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