IEX - Insulation Expo Europe Logo
24 – 25 June 2020
Exhibition Centre Nuremberg


NETZSCH at IEX – Insulation Expo Europe 2018:

Determination of Thermal Conductivity:
The New NETZSCH HFM 446 Lambda Series


Factory Production Control of Insulating Materials as an Integral Part of CE Conformity

By placing the CE marking on your product, you – as a manufacturer of insulating materials – are declaring your products are being manufactured in accordance with the European Insulating Standards and that you are upholding the material‘s required performance properties. Determination of Thermal Conductivity and R-Values are the most important step in Quality Control.

In order for you to attain CE conformity for your product and certify its quality, external inspection centers first determine your performance properties. They examine your product with respect to standards for building materials or requirements for building-authority approval.
These external inspection centers will later carry out routine monitoring of your production centers. Along with these audits and corresponding sampling from your production, it is also firmly stipulated in the European Insulating Materials Standards DIN EN 13162 ff. to DIN EN 13172 that the warranted performance properties are to undergo inspection during production. Depending on the insulating material, you may be obligated to regularly check and document any of the following properties via factory production control:

  • Fire-safety properties
  • Mechanical strength
  • Setting and creep behavior
  • Water absorption
  • Aging behavior
  • Density
  • Thermal conductivity
  • And other properties

The external inspection centers also monitor and check the measurement instruments employed, the technical equipment and your documentation.

As a manufacturer of laboratory equipment for thermal analysis and the measurement of thermophysical properties, NETZSCH-Gerätebau GmbH has developed the HFM 446 Lambda instrument series. It allows for determination of the thermal conductivity of insulating materials in accordance with ISO 8301 and ASTM C518 by means of a stationary heat flow. Lambda here stands for the Greek letter λ as a formula symbol for thermal conductivity.

Increase Your Efficiency
In all areas of industry, our customers around the world benefit from our measuring instruments for determination of temperature-dependent material properties. Moreover, we are always eager to be involved in the production processes of our customers. To address the specific requirements stipulated by standards and legislation, we provide easy and efficient methods with corresponding softwaresolutions.

For you as a manufacturer of insulating materials, the
following issues are of crucial importance:

  • Routine measurement of the thermal conductivity
  • Documentation of the measured values
  • Documentation of the long-term stability of the measuring instrument
  • Statistical evaluation of the measured values

HFMxx.jpg Our HFM 446 Lambda instrument along with its appertaining software offers you a comprehensive tool to meet these needs. Day-to-day measurements on your production samples can be calculated in terms of the statistical measurement value λ90/90 by a single mouseclick. This is the basis for determining the CE-compliant.
Perhaps you already have non-NETZSCH measuring instruments in your quality control and would like to include test results from these in your statistical evaluation?
No problem. Don‘t hesitate to contact us and we will provide you with appropriate import filters after screening your data.
Nominal Value of the Thermal Conductivity, λLambda9090.png

Our comprehensive reporting possibilities will facilitate documentation for you and ensure that your factory production control will always be documented in a fully traceable manner.

If you would like to learn more about the determination of the statistical value λ90/90, we recommend our LinkedIn-Article:

What Is the Relationship Between the Thermal Conductivity and "Lambda 90/90"? Read more.