Heat Flow Meter
In-Lab Thermal Conductivity Testing
Description
A measurement of thermal conductivity is an indicator of the ability of a material to conduct heat and can be critical for defining energy efficiency and thermal performance in materials. BETAC utilizes the Netzsch Heat Flow Meter (HFM) 446 Lambda Series Heat Flow Meter method for thermal conductivity and thermal resistance measurement, with the additional capability of measuring the specific heat capacity of materials. The equipment was designed and engineered to provide rapid results with a combination of high accuracy, repeatability, and a wide temperature range.
Features and Benefits
Thermal Conductivity Measurements
- On insulating materials, polymers, phase-change materials, aerogels, non-wovens, and many more
Easy and fast set up
- Factory calibrated with certified reference materials (NIST SRM 1450d)
Best Test Conditions
- Closed test chamber minimizes influence of the environment and reduces condensation risks
From Lower to Higher Conductivities
- The use of external thermocouples extends the thermal conductivity range to a higher level
“Drive- to-thickness” Feature
- Variable external load for precise measurements on compressible materials and thus density of compressible materials
Measurement of specific heat capacity (cp)
- Based on step method
Increased accuracy
- Possibility to combine single heat flux calibrations using HFT (Heat Flux Transducer) MultiCalibration
Technical Specifications
| Minimum | Maximum | Units | |
|---|---|---|---|
| Equipment | |||
| Temperature | -30 (-22) | 90 (194) | °C (°F) |
| Setpoints | 1 | 10 | N/A |
| Sample Size | |||
| Width | 300 (11.8) | 305 (12) | mm (inches) |
| Depth | 300 (11.8) | 305 (12) | mm (inches) |
| Thickness | 105 | mm (inches) | |
| Thermal Conductivity | 0.002 (0.00116) | 2.000 (1.16) | W/m∙K (BTU/(h∙ft∙°F) |
Testing Standards
| Standard | Description |
|---|---|
| ASTM C518 | Steady State Thermal Transmission |
| ASTM C1784 | Thermal Transmission Properties of Phase Change Materials |
| ISO 8301 | Thermal insulation — Determination of steady-state thermal resistance and related properties — Heat flow meter apparatus |
| DIN EN 12664 (not HFM Large) | Thermal performance of building materials and products – Determination of thermal resistance by means of guarded hot plate and heat flow meter methods – Dry and moist products with medium and low thermal resistance |
| DIN EN 12667 | Thermal performance of building materials and products – Determination of thermal resistance by means of guarded hot plate and heat flow meter methods – Products of high and medium thermal resistance |
| JIS A1412 | Test method for thermal resistance and related properties of thermal insulations – Part 1: Guarded hot plate apparatus |
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