TPS-3 Transient Plane Source

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, pastes, and powders

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Features

We 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 Keithley meter or for use on your own.

The basic theory is that the sensor, which is placed 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 recorded over time. The heat generated is then diffused into the sample at a rate dependent on the thermal transport characteristics of the material.

Specifications

Materials	Solids, 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 20 mm diameter TPS Double Spiral Sensor (Model 46171).

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

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 316

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

Transient Plane Source (TPS) Models Comparison


Models	MP-1 with TPS	MP-V with TPS	TPS-3	MP-2 with TPS-4
Thermal Conductivity	0.005 to 2000 W/m•K	0.01 to 100 \| 0.01 to 500 W/m•K	0.03 to 70 W/m•K	0.03 to 5 W/m•K
Additional Properties	Thermal Diffusivity, specific heat, thermal effusivity, thermal contact resistance and thermal resistance	Thermal diffusivity, specific heat and thermal effusivity	Thermal diffusivity and specific heat	N/A
Measurement Time	0.25 to 2560 seconds	2 to 160 seconds	10 to 160 seconds	10 to 40 seconds
Sample Size*	5 mm diameter x 0.01 mm height to unlimited	10 mm diameter x 0.05 mm height to unlimited	40 mm diameter x 5 mm height to unlimited	35 x 35 to unlimited
Reproducibility	1%	1 to 2%	2%	2%
Accuracy	3%	5%	5%	5%
Temperature Range	-160 to 1000 °C	-75 to 300 °C	10 to 80 °C	10 to 40 °C
Optional Sensors	THW, TLS, MTPS, THS	THW, TLS, MTPS	N/A	THW, TLS
Standards	ISO 22007-2, ISO 22007-7, GB/T 32064	ISO 22007-2, ISO 22007-7, GB/T 32064	N/A	N/A
iTransient Parameter Automation	Yes	Yes	N/A	N/A
Single-Sided	Yes	Yes \| MTPS (Ø 12.8 mm)	N/A	Yes

*Dependent on module in the end of the table

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TPS-3 Transient Plane Source

Features

Specifications