HFM - Heat Flow Meter Thermal Conductivity Analyzer

Description

This Heat Flow Meter provides a rapid and easy to use instrument to determine the thermal conductivity properties of low thermal conductivity insulation materials and other materials with a high level of accuracy. The instrument is designs as per ASTM C518, JIS A1412, ISO 8301 and DIN 12667. The principle of measurement is to position a sample between a hot and a cold plate, and cold plate and to measure the heat flow.

System Design
The LINSEIS Heat Flow Meter is a robust and reliable instrument. Its unique design enables highly accurate measurements within minutes. The system provides an excellent long term stability enabling precise long term aging studies. Fast measurement cycles as little as 15 minutes can be achieved, resulting in a high sampling rate. To enable these fast and precise sampling intervals the instrument uses a dual sensor arrangement. An integrated length measurement provides immediate sample thickness data.

Instrument Features
• Highest precision and accuracy
• Very robust design
• Very easy handling
• Fast sampling (approx. 15min for QC)
• Automated operation
• No cooling water required
• No PC required

Specifications

Models	HFM 300/1	HFM 300/2	HFM 300/3	HFM 600/1
Temperature Range (Plates)	Fixed 0 to 40°C	var. 0 to 100°C	var. -30 to 90°C	var. -20 to 70°C
Cooling system	Forced Air	Forced Air	External Chiller	External Chiller
Temperature control (Plate)	Peltier	Peltier	Peltier	Peltier
Measurement Data points	1	15	15	15
Sample size	300x300x100mm3	300x300x100mm3	300x300x100mm3	600x600x200mm3
Th. resistance measuring range	0.1 to 8.0m2K/W	0.1 to 8.0m2K/W	0.1 to 8.0m2K/W	0.1 to 8.0m2K/W
Th. conductivity measuring range	0.005 to 0.5 W/m*K	0.005 to 0.5 W/m*K	0.005 to 0.5 W/m*K	0.005 to 0.5 W/m*K
Reproducability	0.5%	0.5%	0.5%	0.5%
Accuracy	+/- 1 to 3%	+/- 1 to 3%	+/- 1 to 3%	+/- 1 to 3%

Software

The instrument can be operated through the touch screen front panel. Optional software free of charge is available. This state of the powerful software package bit software enables convenient temperature programming, data storage and instrument control.

Key features:
• Easy measurement parameter input
• Measurement data storage and export
• Report printing, layout can be customized
• Multi language software versions
• Instrument monitoring (plate temperature, thermal conductivity results and output signal monitoring)
• Software help functions
• Optional user login and data monitoring

Applications

Materials
Polymers, Organics, Ceramic/Glass/Building Materials, Inorganics

Industries
Ceramics, Building Materials and Glass Industry, Automotive / Aviation / Aerospace, Research, Development and Academia, Cosmetics, Pharmaceuticals and Food Industry

Applications Example:

The present measurement clearly demonstrates the outstanding reproducibility of the LINSEIS HFM series. A reproducibility of 0.5% was achieved. The graph display four measurements of an Elastomer Foam in the temperature range 15 to 40°C. The sample was removed and placed into the instrument again after each measurement.

Repeatability:

15 Measurement of the IRMM-440certified reference material (Resin bonded glass fiberboard) with a thermal conductivity of 0,03276+-0,00028 at 30°C and 0,03103+-0,00028 at 15°C.

Precision:

The graph shows two measurements of the same glass wool specimen at several temperatures. The black line shows the thermal conductivity according the manufacturer information.

Downloads

Linseis_HFM.pdf (1,116.9 kB)