Guarded Heat Flow Meter

A portable Guarded Heat Flow Meter for the Thermal Conductivity Measurement of Metals, Polymers and Composites. GHFM-02 follows the trusted steady-state approach, with the addition of a guard to limit the effects of lateral heat loss.

ASTM E1530-19

GHFM-02 Specification

MaterialsMetals, Polymers and Composites
Measurement CapabilitiesThrough-Thickness
Thermal Resistance0.00007 to 0.25 m2 K/W
Thermal Conductivity0.1 to 15 W/mK
Measurement TimeTypically 30-60 minutes
Reproducibility2%
Accuracy5%
Temperature20°C – 30°C
Sample Diameter50.8 mm / 2 in.
Maximum Thickness25.4 mm / 1 in.
StandardsASTM E1530-19

ECONOMICAL. ACCURATE.

STANDARD GHFM-02 TESTING STACK

The GHFM-02 comes with a standard 50.8 mm (2 inches) diameter sample opening to allow testing of metals, polymers and composite materials. Sample thickness can vary up to 25.4 mm (1 inch). Typically a 20°C temperature delta from top to bottom of the sample is set to a mean temperature of 20°C to 30°C. Temperature points TU , TL and TH are then entered into the included GHFM software for auto calculation of thermal resistance and calibrated thermal conductivity results.

CALIBRATION

The basic GHFM-02 comes calibrated to calculate thermal conductivity from thermal resistance range of 0.0032 to 0.1270 m2 K/W. Additional available calibration ranges allow testing from 0.00007 to 0.25 m2 K/W.

Sample Measurements

1

The Sample

GHFM-02 samples should be 50.8 mm or 2 inches in diameter. The top and bottom surfaces should be flat and parallel.

Approximate Time: < 1 minute

2

PLACE SAMPLE ON GHFM-02 TESTING STACK

A thin layer of the included contact paste should be added to the top and bottom of the sample surface.

Approximate Time: < 2 minutes

3

MEASUREMENT

For a sample mean temperature of 25°C, the top heater should be set to 35°C, while the bottom heat sink chiller – circulator set to 15°C to achieve a delta temperature of 20°C.

Approximate Time: < 2 minutes

4

RESULT CALCULATIONS

Once stable, temperatures from upper temperature (TU), lower temperature (TL) and heat sink temperature (TH) are then entered into the GHFM-02 software for auto calculation of thermal resistance, and calibrated thermal conductivity results.

Approximate Time: < 60 minutes

DOWNLOAD GHFM-02 BROCHURE

    Your email address is 100% safe from spam!

    By clicking on the button(s), you agree with Terms of Use, Privacy Policy