Thermal Conductivity

ASTM D7984, ASTM D5334, ASTM D5930, and IEEE 442-1981


Thermal conductivity testing provides an objective measurement of the rate at which a given material transfers heat.

Test Details

There are a number of test methods for measuring thermal conductivity of a material, including solids, liquids, powers, and pastes. Two common methods are transient plane source (TPS) and transient line source (TLS). Both methods utilize a heated sensor, usually shaped like a needle or a disc, to apply controlled heat to a sample. Technicians then use additional sensors and instruments to measure how quickly heat moves through the material.

Test methods for assessing thermal conductivity include:

ASTM D7984

Standard Test Method for Measurement of Thermal Effusivity of Fabrics Using a Modified Transient Plane Source (MTPS) Instrument

ASTM D5334

Standard Test Method for Determination of Thermal Conductivity of Soil and Rock by Thermal Needle Probe Procedure

ASTM D5930

Standard Test Method for Thermal Conductivity of Plastics by Means of a Transient Line-Source Technique

IEEE 442-1981

Guide for Soil Thermal Resistivity Measurements
ACE is an ISO/IEC 17025 Accredited Independent Laboratory

ANAB is an internationally recognized accrediting organization that assures technical expertise and global acceptance of ISO/IEC 17025 accredited laboratories’ test reports for the purposes of free trade and regulatory acceptance.