TPS-2 Transient Plane Source

The TPS-2 transient plane source is designed to test the absolute thermal conductivity, thermal diffusivity, specific heat of solids, pastes, viscous liquids and powders.

Best for solids, pastes, and powders

Compare TPS

The Transient Plane Source (TPS) for solids, pastes and powders is widely used for accurate measurement of absolute thermal conductivity, thermal diffusivity, specific heat, and thermal effusivity. Conforms to ISO 22007-2: 2015. The TPS-2 has been configured to offer a basic range of 0.01 to 100 W/m•K, with optional max power range of 0.01 to 500 W/m•K.

Features

The sensor 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.

Transient Plane Source (TPS) Sensor

The TPS sensor designed for solids, pastes, and powders is comprised of a double-spiral of nickel encapsulated between layers of insulation. Standard operation of this sensor (Two-Sided) is sandwiched between two pieces of the same sample, with expanded use to Single-Sided sensor, which only requires one piece of sample (Single-Sided). The TPS calculation model measures the thermal conductivity, thermal diffusivity, volumetric specific heat and thermal effusivity of the sample.

Raw Data

Calculation Data

Residual Data

International Standard: ISO 22007-2
Your choice of Two-Sided TPS Sensor/Set-up or TPS Single-Sided Sensor
Absolute thermal conductivity, thermal diffusivity, specific heat and thermal effusivity
Basic Range of 0.01 to 100 W/m•K
Expandable to Max Power Range of 0.01 to 500 W/m•K
Testing Modules for Bulk, Anisotropic, Slab and Specific Heat
Primary measurement of solids, pastes, viscous liquids and powders
Transient Plane Source (TPS)
Bulk and Directional Properties
No calibration or contact agent
The TPS method is a proven technique represented by thousands of publications

Specifications

Methods	Transient Plane Source (TPS)
Materials	Solids, Pastes, Viscous Liquids and Powders
Testing Modules	3D: Bulk, Anisotropic, Slab \| General: Specific Heat
Thermal Conductivity	Basic Range: 0.01 to 100 W/m•K Max Power Range: 0.01 to 500 W/m•K
Sample Size*	10 x 10 mm to unlimited
Sample Thickness*	0.1 mm to unlimited
Additional Properties	Thermal Diffusivity \| Specific Heat \|Thermal Effusivity

Sensor Contact Resistance (m²K/W)	Manually removed
Temperature Range	-75 to 300 °C
Test Time	2 to 160 seconds
Data-Points	Up to 600 points / second
Thermal Conductivity Accuracy	5%
Repeatability	2%
Sample Configuration	Symmetric (Two-Sided) \| Asymmetric (Single-Sided)
Standard	ISO 22007-2:2015

*Based on testing module used.

TPS Sensors

TPS Symmetric (Two-Sided) Sensor

Sensor following classic configuration for testing of solids, pastes and powders, with one sample half on top and bottom, sandwiching the sensor. This forms a semi-infinite medium.

Available: 2, 3.2, 6.4, 10 mm radius

TPS Asymmetric (Single-Sided) Sensor

The TPS single-sided sensor offers excellent accuracy and repeatability without the requirement of two pieces of sample. This is a very convenient sensor for testing large, hard-to-handle samples.

Available: 3.2, 6.4, 10 mm radius

TPS Modules

Thermtest offers a growing selection of testing modules which are grouped based on their testing theory.

3-Dimensional

Standard

Bulk thermal conductivity, thermal diffusivity, specific heat and thermal effusivity.

Basic Thermal Conductivity: 0.01 to 100 W/m•K
Optional Max Power Thermal Conductivity: 0.01 to 500 W/m•K

Anisotropic

In-plane and out-of-plane thermal conductivity and thermal diffusivity.

Basic Thermal Conductivity: 0.01 to 100 W/m•K in both axial and radial direction to the sensor plane
Optional Max Power Thermal Conductivity: 0.01 to 500 W/m•K in both axial and radial direction to the sensor plane

Slab

Isolated in-plane, for thermal conductivity, thermal diffusivity and volumetric specific heat for thin, conductive sheets.

Basic Thermal Conductivity: 0.1 to 100 W/m•K
Optional Max Power Thermal Conductivity: 0.1 to 500 W/m•K
Thickness Range: 0.1 to 5 mm

General

Specific Heat

High accuracy direct measurement of specific heat. Various cell dimensions available, for improved accuracy of heterogenous materials.

Standard Test Cell: 20 mm diameter x 5 mm high

Transient Plane Source (TPS) Models Comparison


Models	MP-1 with TPS	TPS-2	TPS-3	MP-2 with TPS-4
Thermal Conductivity Range	0.005 to 1800 W/m•K	0.01 to 100 \| 0.01 to 500 W/m•K	0.03 to 80 W/m•K	0.03 to 5 W/m•K
Additional Properties	Thermal Diffusivity, Specific Heat, Thermal Effusivity, Contact Resistance	Thermal Diffusivity, Specific Heat, Thermal Effusivity	Thermal Diffusivity, Specific Heat, Thermal Effusivity	No
Sample Size (mm)	5 x 5 to unlimited	10 x 10 to unlimited	40 x 40 to unlimited	35 x 35 to unlimited
Sample Thickness (mm)	0.01 to unlimited	0.1 to unlimited	5 to unlimited	5 to unlimited
Test Time (seconds)	0.25, 0.5, 1, 2, 3, 4, 5, 10, 20, 40, 80, 160, 320, 640, 1280	2, 3, 4, 5, 10, 20, 40, 80, 160	10, 20, 40, 80, 160	20 and 40
Temperature Range	Room Temperature 0 to 300 °C -160 \| -50 \| -20 \| 0 to 300 °C	Room Temperature RT to 300 °C -75 to 200 °C	Room Temperature 10 to 80 °C	Room Temperature 10 to 40 °C
Two-Sided (Symmetric) Sensor	Yes	Yes	Yes	No
Single-Sided (Asymmetric) Sensor	Yes	Yes	No	Yes
TPS Sensors (Radius, mm)	0.5, 0.8, 2, 3.2, 6.4, 10, 15, 30	2, 3.2, 6.4, 10	10	6.4
Contact Resistance (units)	Measured & Manual	Manual	Manual	Automatic
Bulk – 3D Thermal Conductivity	Yes	Yes	Yes	Yes
Anisotropic Thermal Conductivity	Yes	Yes	No	No
Slab Thermal Conductivity	Yes	Yes	No	No
Direct Specific Heat	Yes	Yes	No	No
1-D – Thermal Conductivity	Yes	No	No	No
Thin-Film / Coatings	Yes	No	No	No
Integrated Switch (x 4 channels)	Yes	No	No	No
Temperature Platforms	Yes	No	No	No
Ovens - Automated	Yes	Yes	No	No
Optional THW Method for Liquids	Yes	No	No	Yes
ISO 22007-2 Compliant	Yes	Yes	No	No

Transient Plane Source Accessories

Fan Furnace

TPS Two-Sided Sensor

Two-sided sensor for accurate lab testing

Extended TPS Sensors

Compression Stand + Temperature

Environmental Chamber

TPS Single-Sided Sensor

Spring-loaded sensor for testing large samples or one when only one piece of sample is available.

Testing Cells

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TPS-2 Transient Plane Source