More than 60 years ago, Gebr. Heyl Analysentechnik filed the first patent application for a long-life indicator liquid.
Since then, the original indicators and reagents for our Testomat world have been further developed and produced at the Hildesheim site.
The original indicators and reagents from Heyl enable precise and reliable determination of a wide range of analysis parameters in different types of water and ensure an accurate analysis process with our Testomat® instruments.
Detailed information about our indicators can also be found in our new Original-Indicator-Shop at: Original Indicator Shop (original-indicator.eu)