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Thermtest Instruments Measurement Platform (MP-1) Model：MP-1

The MP-1 is designed to test the absolute thermal conductivity, thermal diffusivity and specific heat of solids, liquids, pastes and powders with the powerful combination of the transient plane source (TPS, ISO 22007-2) and transient hot-wire (THW, ASTM D7896-19) methods.

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Detail information Specification

The powerful combination of Transient Plane Source (TPS, ISO 22007-2) for solids, Transient Hot Wire (THW, ASTM D7896-19) for liquids, Transient Line Source (TLS) and Transient Hot Strip (THS) gives the MP-1 a unique and versatile selection of testing methods for your sample type. The TPS and THW methods are widely used for accurate measurement of absolute thermal conductivity, thermal diffusivity, specific heat and thermal effusivity. This versatility is greatly expanded with the addition of our proprietary Temperature Platform (TP) which is appreciated by academic and commercial users alike.

Following ISO 22007-2 and ASTM 7896-19, the TPS and THW are primary measurement methods trusted worldwide with 1000s of published papers.

MP-1 Methods

All of the transient methods share similar theory, with differences that are specific to their primary design. The basic theory is that 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 placed between two pieces of the same sample, with expanded use to Single-Sided sensor, which only requires one piece of sample (Single-Sided). Our proprietary TPS calculation model measures the contact resistance between sensor and sample, as well as the thermal conductivity, thermal diffusivity, volumetric specific heat and thermal effusivity of the sample.
	Transient Hot Wire (THW) Sensor The THW sensor designed for liquids and phase change materials (PCMs) consists of a replaceable thin heating wire (40 mm in length) secured to specially designed sensor and sample cell which allows back pressurizing liquids to measure thermal conductivity, thermal diffusivity and volumetric specific heat past boiling temperatures. Measurements are done at short test times (1 second) to limit convective effects on samples with a wide range of viscosities.
	Transient Line Source (TLS) Sensor The TLS sensor designed for soil, paste and polymers 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. Heat is delivered to the sample using a constant current source (q) and the temperature rise is recorded over a defined period of time. The slope (a) from plot of temperature rise versus logarithm of adjusted time is used in the calculation of thermal conductivity (k).
	Transient Hot Strip (THS) Sensor The THS sensor designed for solids is comprised of a nickel pattern encapsulated between layers of insulation. Standard operation of this sensor (Two-Sided) is placed between two pieces of the same sample with expanded use to Single-Sided sensor, which only requires one piece of sample (Single-Sided). Our proprietary TPS calculation model measures the contact resistance between sensor and sample, as well as the thermal conductivity, thermal diffusivity, volumetric specific heat and thermal effusivity of the sample.

Methods	Transient Plane Source (TPS)	Transient Hot Wire (THW)
Materials	Solids, Pastes, and Powders	Liquids and PCMs
Testing Modules	3D: Bulk, Anisotropic, Slab \| 1D: Standard, Thin-films General: Specific Heat	Bulk
Thermal Conductivity (W/m•K)	0.005 to 2000	0.01 to 2
Thermal Diffusivity (mm²/sec)	0.01 to 1200	Up to 0.5
Volumetric Specific Heat (MJ/m³K)	Up to 5	Up to 5
Thermal Effusivity (W√s/(m²K))	5 to 60000	N/A
Sample Size*	5 x 5 mm to unlimited	20 mL
Sample Thickness*	0.01 mm to unlimited	N/A
Sensor Contact Resistance (m²K/W)	Measured	N/A
Temperature Platform (TP)	0 to 300 °C -160 °C \| -50 °C \| -20 °C \| 0 to 300 °C	10 to 200 °C \| -15/0 to 200 °C 0 to 300 °C \| -45 to 300 °C \| -160 to 300 °C
Extended Temperature Range	-160 to 1000 °C	N/A
Test Time (seconds)	0.25 to 2560	1 second
Data-Points (points / second)	Up to 600	400
Thermal Conductivity Accuracy	3%	2%
Repeatability	1%	1%
Sample Configuration	Symmetric (Two-Sided) \| Asymmetric (Single-Sided)	N/A
Standard	ISO 22007-2:2022, GB/T 32064	ASTM D7896-19