Technical support:

Here we help you to use our devices smoothly. In order to ensure an easy entry into the chemical measurement process for new technical customers as well, we attach great importance to a modern way of imparting knowledge. At the bottom of the page you will find video instructions for various devices. There we explain step by step how to calibrate or clean your device. But there are many more subject areas covered. If your solution is not included. You can contact us or you can look at the page FAQ .

Operation manual

Have you not received an instruction manual or it can no longer be found? Here is the first solution: We have published all operating instructions on the page Downloads . Or you are looking for the product you are looking for, under the instruction manuals you will find the appropriate instructions for each product. We are currently still revising the operating instructions. Please check us out if your selected manual is still in English.

Can I change the electrodes with PH 20?

No with the 20 series it is not possible to exchange the electrode. Only from the 60 series did we use our innovative technology to replace the electrode .


If you are looking for more detailed information about our products, we have published the catalogs from the last few years on the page Downloads . There you can simply download the desired catalog as a PDF file.

How often can you use the calibration solution?

The calibration solutions can be used up to 10–15 times. After that, you should swap the solution. If the solution is dirty or cloudy, the reading could be falsified. To avoid this, change the fluid regularly. Also note the expiration date of the solution. If you do not know when your solution is best, you can enter the batch number here and you will receive the information.

Where can you buy our products?

You can order our products via Amazon or eBay .
At the moment we do not offer our own online shop. If your place of residence is not in Germany, you can also obtain the products from our other branches, you can find them on the page: About us

What do I do if my device is defective?

If your device no longer works properly, contact the seller. In that case to Amazon or eBay. There you apply for a return and send in the device. There is also the option of submitting a warranty claim to ins's support. Here, however, the shipping fees for sending in apply. We therefore recommend that you send the device to the seller. If you have any questions about our devices or the guarantee, please do not hesitate to contact us.

Videos about the products

To make it easier for our customers to use our products, we have created professional video tutorials. You can find them on our Youtube channel. Or further down the page. We explain how to calibrate the new Grostar ™, for example, or how to use the data management tool in the ZenTest app.

Questions about our products

If you have any questions, please do not hesitate to contact us at
Telephone No +49 (0) 202 51988998 or by email
We will try to answer you as soon as possible. If you would like to contact us as a wholesaler, then use the Contact page.

Question ? Contact us !

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