Water is our Element
Water analysers – Water quality – Water treatment
Gebrüder Heyl Analysentechnik GmbH & Co.KG has been working in industrial water treatment for over 60 years.
We develop and produce measuring and control equipment for the water analysis with 50 employees. Our Testomat series measures more than 20 parameters, including hardness, carbonate hardness, free chlorine and chlorine dioxide.
Our devices are used, for example, in the production of drinking water, in swimming pools, in the food industry as well as in industrial cooling and heating circuits.
Our Chemical Division produces the appropriate indicators and reagents for the devices. In addition we develop and manufacture individual analysis instruments on behalf of our customers.
Product catalog

Jobs and Career
In this section, we inform you about the topics of application, training, internships or student traineeships.
Get an overview of the many employment opportunities at Gebrüder Heyl Analysentechnik.
Manufacturer's declarations
You can now find our manufacturer’s declarations in the download area. Among other things, you will find declarations on REACH, RoHS and SVHC (SCIP).
As a manufacturer of electrical devices, we are obliged to label our appliances and to inform about the possibility of returning old Heyl devices.
For further information, please refer to our manufacturer’s declaration on old devices.
International Visits to Trade Fairs
In 2024 we will participate again on important trade fairs of the water treatment industry.
We will be respresented by Heyl Brothers North America L.P. on all american expositions.
Water Analysis Instruments, Water Quality, Water Treatment News
Testomat® PRO CLT monitors chlorine content

The Testomat® Pro CLT process photometer measures the total chlorine content in the range from 0.00 to 2.5 ppm.
It is used for reliable monitoring of chlorination systems in a wide variety of applications.
The new generation: Testomat® Limit

Testomat® Limit is a new generation limit value measuring device.
The device was originally designed as an improved Testomat® 808 for hardness measurement.
However, it became a completely new device with innovative technologies and advanced measurement technology,
which has far surpassed its predecessor.
Mobile, Secure, Fast And Inexpensive
Reduce Costs And Improve Quality