Service & Support

Our helpful teams are here for you!

We offer you an all-round carefree package with fast response times. So that your production does not come to a standstill.

Technical support

Are you using one of our products and there is a technical problem?

Orders and invoicing

Do you have a question about your invoice or are there problems with your order?

Product advice and prices

Are you interested in one or more products and need advice?

Our team,
Your contacts

Our dedicated team is passionate about understanding your needs and providing you with the best possible service. Whether you need advice, support or customized solutions, our team is here to meet your needs and ensure you always get the best out of our products and services.

Dr. Horst Harrer

Managing Director | Dr. Dipl.-Ing.

Phone: +49 7084 92 48 10

Sebastian Harrer

Development | M.Eng.

Phone: +49 7084 92 48 20

Felix Harrer

Marketing | B.Eng.

Phone: +49 7084 92 48 19

Martina Harrer

Manufacturing

Phone: +49 7084 92 48 13

Rüdiger Kassen

Development | Dipl.-Ing.

Phone: +49 7084 92 48 11

Alexander Vetter

Sales | Dipl.-Ing.

Phone: +49 7084 92 48 15

Tanja Huzel

Purchasing

Phone: +49 7084 92 48 12

Gerald Keck

Service technician

Phone: +49 7084 92 48 16

Irina Rajda

Manufacturing

Phone: –

Project request

Is it possible to measure your product?

To find out whether a measurement with our measuring instruments is possible for your product or production process, please take a few minutes to fill out the following form.

Personal details

If you have any queries, please enter your telephone number. This will make it easier for us to contact you and clarify details of your inquiry.

Product information
Location of the measurement
Product features
What do you want to measure and in which unit?
L* (0 - 100) | a* (-128 - 128) | b* (-128 - 128)
Where would you like to measure?

Product information for download

Discover our comprehensive product information: Here you will find clear flyers on all our measuring devices and solutions as PDF downloads. Get a detailed overview of the technical specifications and possible applications of our products – conveniently available at any time.

Helping people to help themselves

In order to always provide you with the correct measurement results, all our measuring devices are equipped with error monitoring. If one of your measurements does not work as desired, you will receive an error message on the display of the measuring device.

The following table explains what the displayed abbreviations mean and provides assistance with troubleshooting.

Overview of error messages for our measuring devices

Error code Error description
RUN The display indicates proper function.
RN1 ADC overflow. The sensor is not covered with product, resulting in high measuring rates. (e.g. empty pipe).
RN2 The measured value has exceeded or fallen below one of the specified limit values of the attenuation signal and the current output is held or set to 0/4 mA or 20 mA.
RN3 The measured Bx value has exceeded the specified Bx limit value and the current output is set to 0/4 mA.
RN4 The measurement rates are unstable and are discarded. The last stable value is displayed.
RN5 The measurement rates are unstable and are discarded. The last stable value is displayed.
RN6 The measured value has fallen below the specified MIN limit value. The current measured value is discarded and the current output is held at the last value.
RN7 The measured value has exceeded the specified MAX limit value. The current measured value is discarded and the current output is held at the last value.
RN8 T3 is active. (If the relay is defined in the time function).
RN9 External STOP is active. (The contact is closed.)
RNA Loading < MIN loading.
RNB The measuring frequency used by the device is not stable, measured value fluctuations may occur.
Error code Error description
RUN The display indicates proper function.
RN1 ADC overflow. The microwave reception level is too high. I.e. the antennas are too close together or there is no product between the antennas (empty band).
RN2 –
RN3 –
RN4 –
RN5 –
RN6 –
RN7 Pause, wait for next product with multiple measurement.
RN8 Measurement complete, product in the measuring section.
RN9 The device is waiting for product (triggered by the height sensor).
RNA –
RNB –
Error code Error description
RUN The display indicates proper function.
RN1 ADC overflow. The sensor is not covered with product, resulting in high measuring rates. (e.g. empty pipe).
RN2 The measured value has exceeded or fallen below one of the specified limit values of the attenuation signal and the current output is held or set to 0/4 mA or 20 mA.
RN3 The measured Bx value has exceeded the specified Bx limit value and the current output is set to 0/4 mA.
RN4 The measurement rates are unstable and are discarded. The last stable value is displayed.
RN5 The measurement rates are unstable and are discarded. The last stable value is displayed.
RN6 The measured value has fallen below the specified MIN limit value. The current measured value is discarded and the current output is held at the last value.
RN7 The measured value has exceeded the specified MAX limit value. The current measured value is discarded and the current output is held at the last value.
RN8 T3 is active. (If the relay is defined in the time function)
RN9 External STOP is active. (The contact is closed).
RNA Loading < MIN loading.
RNB The measuring frequency used by the device is not stable, measured value fluctuations may occur.
Error code Error description
RUN The display indicates proper function.
RN1 Free-fall sensor is filled with product.
RN2 The spectrum has exceeded the maximum value of 16384DLU. The current measured value is discarded and the current output is held at the last value.
RN3 The spectrum has exceeded the specified MAX limit value. The current measured value is discarded and the current output is held at the last value.
RN4 The measured value has fallen below the specified MIN limit value. The relay for the limit value function switches.
RN5 The measured value has exceeded the specified MAX limit value. The relay for the limit value function switches.
RN6 The spectrum has fallen below the specified MIN limit value. The current measured value is discarded and the current output is held at the last value.
RN7 There is not enough product on the belt. The measurement is stopped. The current measured value is discarded and the current output is held at the last value.
RN8 Empty the free-fall sensor with compressed air.
RN9 The measurement is stopped by an external start/stop signal (switch).
RNA –
RNB –
Error code Error description
RUN The display indicates proper function.
RN1 Free-fall sensor is filled with product.
RN2 The spectrum has exceeded the maximum value of 16384DLU. The current measured value is discarded and the current output is held at the last value.
RN3 –
RN4 –
RN5 –
RN6 –
RN7 –
RN8 Empty the free-fall sensor with compressed air.
RN9 The measurement is stopped by start/stop, altitude measurement, DLU min/max.
RNA –
RNB –
Error code Error description
RUN The display indicates proper function.
RN1 –
RN2 The spectrum has exceeded the maximum value. The current measured value is discarded and the current output is held at the last value.
RN3 –
RN4 –
RN5 –
RN6 –
RN7 –
RN8 –
RN9 The measurement is stopped by start/stop, altitude measurement, DLU min/max.
RNA –
RNB –
Error code Error description
RUN The display indicates proper function.
RN1 ADC overflow. The sensor is not covered with product, resulting in high measuring rates. (e.g. empty pipe).
RN2 The measured value has exceeded or fallen below one of the specified limit values of the attenuation signal and the current output is held or set to 0/4 mA or 20 mA.
RN3 The measured Bx value has exceeded the specified Bx limit value and the current output is set to 0/4 mA.
RN4 The measurement rates are unstable and are discarded. The last stable value is displayed.
RN5 The measurement rates are unstable and are discarded. The last stable value is displayed.
RN6 The measured value has fallen below the specified MIN limit value. The current measured value is discarded and the current output is held at the last value.
RN7 The measured value has exceeded the specified MAX limit value. The current measured value is discarded and the current output is held at the last value.
RN8 T3 is active. (If the relay is defined in the time function)
RN9 –
RNA –
RNB The measuring frequency used by the device is not stable, measured value fluctuations may occur.
Error code Error description
RUN The display indicates proper function.
RN1 –
RN2 The spectrum has exceeded the maximum value. The current measured value is discarded and the current output is held at the last value.
RN3 –
RN4 –
RN5 –
RN6 –
RN7 –
RN8 –
RN9 The measurement is stopped by start/stop, altitude measurement, DLU min/max.
RNA –
RNB –
Error code Error description
RUN The display indicates proper function.
RN1 Free-fall sensor is filled with product.
RN2 The spectrum has exceeded the maximum value of 16384DLU. The current measured value is discarded and the current output is held at the last value.
RN3 The spectrum has exceeded the specified MAX limit value. The current measured value is discarded and the current output is held at the last value.
RN4 The measured value has fallen below the specified MIN limit value. The relay for the limit value function switches.
RN5 The measured value has exceeded the specified MAX limit value. The relay for the limit value function switches.
RN6 The spectrum has fallen below the specified MIN limit value. The current measured value is discarded and the current output is held at the last value.
RN7 There is not enough product on the belt. The measurement is stopped. The current measured value is discarded and the current output is held at the last value.
RN8 Empty the free-fall sensor with compressed air.
RN9 The measurement is stopped by an external start/stop signal (switch).
RNA –
RNB –
Error code Error description
RUN The display indicates proper function.
RN1 –
RN2 –
RN3 –
RN4 –
RN5 Below lower limit value.
RN6 Upper limit value exceeded.
RN7 –
RN8 –
RN9 The measurement is stopped by an external start/stop signal (switch).
RNA –
RNB –
Error code Error description
RUN The display indicates proper function.
RN1 –
RN2 –
RN3 –
RN4 Below lower limit value.
RN5 Upper limit value exceeded.
RN6 –
RN7 –
RN8 –
RN9 External STOP is active. (The contact is closed.)
RNA –
RNB –