ZEISS Corona® extreme

The robust spectrometer system for agriculture

Successful agriculture production has always been a question of experience and commitment. Wrong decisions can have serious consequences. In today’s ever changing environment, nature cannot be fully planned and accurate results cannot always be determined. However, through targeted examination of the process, it can be analyzed better. With over twenty years of experience in process technology, ZEISS is one of the world leader in the measurement and analysis of continous process applications.

Precision decides. Every day, in real-time.

ZEISS Corona extreme and ZEISS InProcess software is the spectrometer system designed to increase productivity in agriculture analysis. The idea was to create a measuring sensor, which is a key component of the process in extreme conditions for the entire product life cycle. With the ZEISS competence in hardware, software and engineering this resilient and precise system can withstand extreme workloads and is considerably superior to lab measurements.

ZEISS Corona extreme is designed based on much application-related experience and provides reliable measurement results for each sample. The compact system is easy to install and can be operated independently using the embedded controller, which enables a direct evaluation and output of the predicted data without the use of a computer. The spectrometer features fibre free, high-energy illumination with outstanding optical properties and internal referencing.

Technology & Technical Data

1 Interfaces

  • Innovative plug design
  • OPC UA and DA, Profinet, Profibus, EtherNet/ IP, analogue und digital I/Os, Modbus, SQL-Database, Socket, …

2 Housing

  • IP 66 housing
Corona Extreme
Corona Extreme

3 Spectrometer

  • Plane grating spectrometer (PGS)
  • Internal b/w referencing
  • Two versions (with and without embedded PC)

4 Measuring head

  • Low voltage halogen lamps, longer service life 20.000 hours
  • Robust sapphire flange for connection to harvesting machinery and closed systems
Technical Data Corona extreme


diode array spectrometer


PGS (Plane Grating Spectrometer)

Measurement range

950 - 1650 nm

Mean spectral pixel pitch

3 nm

Spectral resolution ((half width at 1/10 max.)

</= 10 nm

Wavelength accuracy

</= 1 nm

Wavelength reproducibility

</= 0.1 nm

Light source


Protection standard

II 3D Ex tc IIIC T60°C Dc IP66


256 x 191 x 253 mm3


10 kg

Range of operating temperatures

- 15°C to + 50°C

Power supply voltage

9-36 V SELV

Your benefits

Extremely resilient, extremely precise and extremely reliable – ZEISS Corona extreme.

  • Easy on-line installation
  • InProcess Communication through OPC with the PLS plant software
  • Automatic process disruption in case of emergency for maximum safety
  • Automatic internal referencing depending on environmental conditions
  • Unaffected by temperature fluctuations from -15 to +50 °C in both moist and dusty conditions
  • Protected against voltage fluctuations
  • May be easily connected to a vehicle’s on-board power supply
  • Sensor protection due to integrated measuring head and sapphire flange
  • 50 g shock resistance
  • Long-term stability; does not require frequent external calibration and only needs little maintenance
  • Data communication via user specific interface such as Ethernet, Digital IO
  • Suitable also for lab applications


High time for a solution. ZEISS Corona extreme.

The quality of natural products is subject to natural fluctuations in the environment. The agriculture industry has to maintain standard requirements for processing materials and related documentation. Corona extreme offers the right technology for accurate process control to maintain consistent quality of the final product. The precise measurements are carried out in real-time to optimize process control and to minimize time, waste and cost. Seamless data integration increases product safety. Applications specific calibration and support can be provided upon request.

Industries Applications Products Parameters Results

Field Testing

Analysis on plot harvester

Full maize plants, grass, unripe rye and wheat, grain such as wheat, rye, rapeseed, corn

Determination of dry matter content and protein

Determination of quality, yield measurement, evaluation of cultivation success during field harvests, cultivation of new varieties

Cereals Trade

Inspection at transshipment points

Grain such as wheat

Measurement of moisture, protein, gluten, hardness, determination of quality

Sorting, drying and storage, sale in accordance with specification

Grain Processing

Measurement on delivery

Grain such as wheat

Measurement of moisture, color, protein content, ash content and starches for process control

Guarantee of quality

Bioenergy I

Measurement on delivery

Maize silage, grass silage, whole plant silage (renewable resources), liquid manure, residual materials

Evaluation based on potential gas input – gas generation potential

Process control and optimization (room load, retention period)

Bioenergy II

Measurement during process

Maize silage, grass silage, whole plant silage (renewable resources), liquid manure, residual materials

Stability of fermentation based on individual acids

Process control and optimization (room load, retention period)


Measurement on delivery

Feeding staff, animal feed

Measurement of energy content (proteins, fiber fractions such as ADF, NDF, lignin, cellulose, hemicellulose)

Process control and optimization (mixing processes) for the production of concentrated foodstuffs


Measurement during or before spreading

Farmyard manure

Measurement of nitrogen, ammoniacal nitrogen, phosphorous, potassium

Process optimization, compliance with legal stipulations, process optimization, saving the cost of chemical fertilizers and targeted spreading in order to influence the quality of the harvest


ZEISS Corona extreme

The robust ZEISS spectrometer system for the Agricultural Industry

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file size: 3580 kB

ZEISS Corona extreme and ZEISS Corona process

Spectrometer systems for process optimization and increase in production efficiency

pages: 2
file size: 1519 kB

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