Corona Process

ZEISS Corona® process

The spectrometer system that meets all necessary requirements at the highest level.

For the highest demands - The requirements in food production environments concerning quality and hygiene are extremely high. The careful use of resources and the avoidance of waste are important factors in terms of the environmental scorecard. To ensure profitable production, process inspections and optimization take on major importance. Corona process allows you to put economic and environmental claims into practice – no matter in which field of the food industry they are operating.

About Corona process

Perfectly coordinated components combined with new ZEISS ProcessAssist systems make Corona process one of the safest spectrometer systems. The quality parameters which are relevant for your process can be measured even more comfortably using the ZEISS ProcessAssist.

Corona process warns you if critical limit values are being exceeded and a reaction is required immediately. The automatic logging of the environmental conditions always ensures reliable measuring results regardless of the sample height, temperature, air humidity or vibrations. If necessary, it also controls internal referencing. To avoid down time, bulb functioning is also monitored automatically. If a bulb fails, the second full-power bulb is deployed immediately and the Corona process can continue its tasks uninterrupted.

Technology & Technical data


  • Plane grating spectrometer (PGS)
  • Monolithic miniature spectrometer (MMS)
  • Internal referencing


  • Non-sensitive to distance variation
  • Redundant halogen lamp
Corona Process
Corona Process


  • Stainless steel housing according to hygiene standards
  • IP67, ATEX zone 22
  • Simple and customized assembly


  • Innovative plug design
  • OPC UA and DA, Profinet, Profibus, EtherNet/ IP, analogue and digital I/Os, Modbus, SQL-Database, Socket, ...
  • 24 V power supply

Technical data

Corona process

Usable spectral range

380 nm – 1650 nm

Spectral resolution (half width at tenth maximum)

≤ 10 nm

Wavelength accuracy

≤ 1.0 nm 

Measuring distance

100 mm – 590 mm

Measuring spot

> 30 mm

Light source, service life of bulb

2 halogen bulbs (1 redundant), each 10.000 h

Housing size B x H x T

360 x 160 x 220 mm⊃3;


15 kg

Protection class

II 3D Ex tc IIIC T70°C Dc IP67

Operating temperature

-10 °C to 50 °C

Warm-up time

< 30 min

Your benefits

Every process is different and has its own very unique conditions – some of which may be extreme. However, for the new Corona process this is not a problem. The large spectral range which covers the visible and the near infrared range enables a broad spectrum of applications.

Corona Process benefits
  • Easy integration into any technological process
  • Compact design: only one installation site is required (optics, spectrometer, measurement head, electronics & referencing are in the same housing together)
  • No need to use light guides: influencing and losses do not occur
  • Stainless steel housing: meeting all hygiene requirements
  • Excellent long-term stability 
  • No frequent external calibration required
  • Measurement accuracy at a distance from 80 up to 600 mm from the sample
  • Unaffected by temperature fluctuations from – 10 to + 50 °C
  • Protection against shock and vibrations: reliability in all process environments
  • 20,000 hours total service life of bulbs
  • Remarkably little maintenance required only
  • Automatic internal referencing depending on environmental conditions
  • Automatic monitoring of bulb function and automatic switching to the second full-power bulb
  • Automatic compensation of sample distance influence even when sample heights vary dramatically
  • Automatic warning when limit values are exceeded

Countless applications






Meat products

Analysis on mixer

Sausage meat for various types of sausage, minced meat

Fat, lean meat, water, salt

Compliance with formulas and legal limit values

Dairy products

Process and final inspection 

Raw milk, whey, milk and whey powder, butter, etc. 

Fat, protein, moisture, fat-free dry mass 

Process optimization, consistent product quality, waste reduction 


Analysis during blanching 

Peas, beans, broccoli, etc. 

Degree of doneness, color 

Shortening of process time, waste reduction 

Potato products

Process control 

Fries, potato chips, potato-based finished products 

Color, moisture, fat, starch, salt 

Process optimization, shortening of process time, reduction of energy consumption 


Analysis during roasting

Coffee beans

Degree of roasting and color

Optimization and control of roasting process and of the desired quality


Inspection of incoming goods, optimization and control of the manufacturing process

Raw tobacco, fine cut, raw tobacco powder

Moisture, nicotine, sugar

Quality of raw materials, adherence to formula, increased productivity, traceability

Connected spectroscopy

The future of spectroscopy is in the cloud

Knowledge is power and accessible to all.

Smart, flexible and ready with real-time data - connected spectrometers provide users with near instant insights into production processes and product quality. ZEISS is the first company to offer such an innovative spectroscopy solution. It connects to Microsoft’s Azure Cloud platform, allowing a spectrometer, such as a Corona process, to send its data straight to a central repository. This gives
users unparalleled access to important quality measurements. The information are available to all the individuals responsible for monitoring and optimizing production, speeding up decision making and making processes more efficient and effective.

Related downloads

Manufacturer's Declaration ZEISS Corona process

ATEX - Manufacturer's Declaration for ZEISS Corona process

pages: 1
file size: 52 kB

ZEISS Corona extreme and ZEISS Corona process

Spectrometer systems for process optimization and increase in production efficiency

pages: 2
file size: 1519 kB

ZEISS Corona process

The new ZEISS spectrometer system for the Food Industry

pages: 15
file size: 4024 kB

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