THISYS thermal conductivity measurement system

THISYS thermal conductivity measurement system
TPSYS02 PC controlled thermal conductivity measurement system
THISYS samples are sheets of metals, alloys and plastics
THISYS is fully PC controlled
Apparatus for thermal conductivity measurement of thin samples

THISYS offers an accurate, fast and uncomplicated measurement of the thermal conductivity of thin samples of high thermal conductivity materials. Typical samples are sheet materials of metals, alloys and high conductivity plastics with various filler materials. Metal samples are ideally in the thickness range of 0.1 mm or less, plastic samples typically in the thickness range of 6 mm, composites in between. THISYS is a combination of a Thin Sample Instrument (THI01) and a Measurement and Control Unit (MCU). The measurement essentially determines the temperature gradient across the sample when it is heated, in the plane of the sample itself. Employing a specially designed high accuracy thermopile sensor THI01 can handle thin sample materials (less than 0.01 to 6 mm) usually in the thermal conductivity range to 200 W/mK. Following this method, problems with contact resistance are avoided. The method is a good alternative when procedures according to ASTM D5470 are failing. Using a climate chamber a large temperature range can be covered, performing measurements at regular intervals. THISYS is fully PC controlled. For use with low thermal conductivity materials a different model, type THASYS, is available.

Specifications
Measurand
  • thermal conductivity
  • thermal resistivity
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or contact us: info@hukseflux.com

Specifications

Measurand
  • thermal conductivity
  • thermal resistivity
THI01 specifications
  • :
Test method
  • thin sample analysis
Temperature range
  • -30 to +120 °C
Accuracy (λref) (depending on samples)
  • depending on reference, typically +/- 6% @ 20 °C with H. λ around 4 10⁻³ m²K/W
Repeatability (λref)
  • +/- 2% @ 20 °C
Total measurement time
  • 3000 s (typical)
Power requirements (switched)
  • 15 V, 0.8 Watt (typical)
Heater (resistance, diameter)
  • 50 Ω, 80 mm
Sample requirements
  • H = up to 6 mm, A around 70 x 50 mm H.λ = 1 to 5 10⁻³ m²K/W
Sample surface A: preferred
  • 70x110 mm, always > 50x50 mm
Temperature sensing Pt100
  • Class B, IEC 751:1983
Traceability
  • NPL National Physical Laboratory UK
MCU01 specifications
  • :
Differential temperature readout
  • 0.5 μV @ 0 - 30 °C
Pt100 readout
  • +/- 0.2 °C @ 20 °C
Voltage input/output
  • 220-110 VAC / 15 VDC
Communication
  • RS232

Description

THISYS system

THISYS

The measurement of thin materials with relatively high thermal conductivity is a classic problem. Commonly used methods like ASTM D 5470 - 01 (Standard Test Method for Thermal Transmission Properties of Thin Thermally Conductive Solid Electrical Insulation Materials) have shown to be highly sensitive to contact resistance, and not applicable with high conductivity materials. THISYS offers a solution to this problem.

THISYS essentially measures the temperature gradient from centre to side across the sample when mounted across a well insulated cavity, and heated with a known uniform flux.

THISYS is fully PC controlled

THI01 Design

The Hukseflux THI01 employs two aluminium "heat sinks". Each of these contains a heater that is mounted over an air-filled, insulating cavity. The sample is installed over the cavities. The resulting temperature gradient (centre-edge) is measured. Apart from the new design, the technological novelties are a thin thermocouple thermopile (proprietary Hukseflux design) performing an accurate and ultra-sensitive differential ΔT measurement, and the fact that the measurement is performed in a bath of glycerol.

TPSYS02 PC controlled thermal conductivity measurement system

MCU01 Design

The MCU performs the functions of measurement and control as well as data storage. It is PC operated. Software in a Windows environment is part of the delivery. The parameters cycle time, sample thickness and heater area are entered and the experiment is started from the screen.

Suggested use

  • high thermal conductivity sheet materials
  • metal alloys
  • high thermal conductivity composite materials
THISYS thermal conductivity measurement system
THISYS thermal conductivity measurement system
  • accurate, fast and uncomplicated measurement of the thermal conductivity
Would you like a personalised quote?

or contact us: info@hukseflux.com