Heat transfer fluid analysis service

FRAGOL offers a comprehensive analysis service for heat transfer fluids.
This places particular value in evaluating the results of the analysis.

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 containers if necessary.


Sample information form

Please note that samples can only be analysed if we receive a fully completed sample information form.

Download the necessary sample information form here.

Sample information form in German

Sample information form in English

Please fill out the form and enclose a printed copy with the sample. Please also send the file to the following e-mail address: Proben-HTF (at) fragol.de

Furthermore, we provide guidelines for proper sample collection here.

Oil analysis

Check list for proper sampling:

  • Sufficient flushing of the sampling point
  • Sampling from the main circuit
  • Ideal temperature of the thermal oil when filling into sampling container <80 °C
  • Use of suitable sampling bottles
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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.