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
Thermal conductivity (W/m•K)	0.03 to 70
Additional Properties	Thermal diffusivity and specific heat
Sensor diameter (mm)	20
Smallest sample size (mm)	40 diameter x 5 length

Largest sample size	Unlimited
Test time (seconds)	10 to 160
Accuracy (Thermal conductivity)	5%
Repeatability (Thermal conductivity)	2%
Temperature range (°C)	10 to 80

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 MTPS
Thermal Conductivity	0.005 to 2000 W/m•K	0.01 to 500 W/m•K	0.03 to 70 W/m•K	0.029 to 20 W/m•K
Additional Properties	Thermal Diffusivity, specific heat, thermal effusivity, and thermal contact 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, 20 and 40 seconds
Sample Size*	5 diameter or square to unlimited	10 diameter or square to unlimited	40 diameter x 5 length to unlimited	25 diameter or square to unlimited
Reproducibility	1%	2%	2%	2%
Accuracy	3%	5%	5%	5%
Temperature Range	0 to 300 °C -160 \| -45 to 300 °C up to 750 / 1000 °C	0 to 300 °C -75 to 300 °C	10 to 80 °C	0 to 80 °C
Optional Sensors	THW, TLS, MTPS, THS	THW, TLS, MTPS	N/A	THW, TLS, TPS-EFF
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