Heat transfer fluid Analysis service

FRAGOL offers a comprehensive analysis service for heat transfer fluids. We pay particular attention to the assessment and evaluation of the analysis results.

The following tests are offered:


  • Synthetic heat transfer fluids according to DIN 51529
  • Mineral oil-based heat transfer fluids according to DIN 51529
  • Determining the proportion of silicone oil in the thermal oil for biomass heating plants with ORC circuit.
  • Special analytics


FRAGOL will provide suitable sample bottles if necessary.


Sample information form

Please note that samples can only be analyzed and evaluated if we have a completed sample information form and the sample has been drawn correctly. 

Download the necessary form here:


Sample information form HTF in English

Sample extraction guideline in English


Please fill out the form and enclose a printed copy with the sample. Please also send the form as a pdf file to the following e-mail address: Proben-HTFfragol.de

Please send the collected sample to:

FTS FRAGOL Technical Services
c/o August Gaehringer GmbH & Co. KG
Koeniggraetzer Str. 14-34
47053 Duisburg

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Business Units

Heat Transfer Fluids

Phone: +49 (0)208-300-02-50
Fax: +49 (0)208-300-02-33
Email: waermetraegerfragol.de


Phone: +49 (0)208-300-02-40
Fax: +49 (0)208-300-02-77
Email: lubesfragol.de


Phone: +49 (0)208-300-02-25
Fax: +49 (0)208-300-02-31
Email: rewefragol.de

Please use our contact form

For emergencies outside office hours:
+49 (0)208-300-02-99.