When is it necessary to take samples of the thermal oil?

The regular examination of samples taken from the heat transfer medium circuit is an important precondition for the safe operation of a heat transfer system and BetrSichV (Annex 2) (German industrial safety regulation) requires an analysis at least once a year.

However, reliable statements can be made only then when the samples have been taken properly, representatively, and exactly. This requires the compliance with DIN 4754-1.