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NIR-Online Process Analyzers


Real time process control

Buchi NIR-Online Process Analyzers

Keep a close eye on complex chemical parameters to correct any deviations occurring during manufacturing. Use NIR-Online PA2 sensor to achieve true continuous process monitoring thanks to accurate, reliable NIR measurements.

1. Diode array technology:
2. Ultra fast speed spectrometer
3. IP class/ATEX:
4. Dust & water jet protected (IP66), ATEX certification (dust)
5. NIR wavelength:
6. Extended NIR wavelength range (1,100-2,200 nm)

Ease of use

Easily and intuitively operate the NIR-Online PA2 regardless of expertise level. Benefit from unprecedented access into the process thanks to visual monitoring of the sample chamber.

Extensive process expertise


The NIR-Online PA2 has been designed based on years of experience with cutting-edge NIR technology. The system offers a turn-key solution for demanding measuring points, for example discontinuous product flows in bucket elevators. Features, such as temperature controlled sensors ensure the reliability of your data. NIR-Online PA2 is also ingress protected (IP66) and ATEX certified against dust to extend the lifetime of your instrument and guarantee smooth operation. Benefit from continuous process monitoring immediately after purchasing NIR-Online PA2 thanks to straight-forward integration with your own process control systems.



Fast payback

Quickly earn back your initial investment for the NIR-Online PA2 with an average payback period of less than 1 year. Benefit from maximal cost-efficiency thanks to immediate process corrections, reduced waste and need to repeat processing steps. Maximize your profit margins by quickly optimizing key parameters of your workflow. You no longer need to develop a wide range of calibrations yourself nor do you need to purchase calibration databases thanks to our patented AutoCal function.

Certified safety for hazardous environments

1. Safely operate your NIR instrument in potentially exposive enviroments according to the ATEX directive for dust

2. Flexibly install the equipment for immediate and personalized use of NIR-Online PA2

3. Maximal safety thanks to ingress protection and fullfillment of sanitary requirements, with all materials in contact with the product at food grade quality

Triple temperature stabilization

1. Highly reliable measurements thanks to cutting-edge NIR technology and instrument design

2. Use at product temperatures of up to 70°C

3. Combine with water chiller for product temperatures of up to 130°C

4. Operate NIR-Online X-One in environments up 55°C when used with air nozzle (voids ATEX).


1. Maximal convenience during NIR measurement thanks to proprietary automated calibration and maintenance.

2. Higher cost-efficiency, safety and speed of your process thanks to eliminating work with external agencies - keep valuable calibration data with you at all times

3. User-friendly software - Simply enter the new reference value and confirm with one click.

4. Use NIR-Online PA2 without the need to export/import, manually calibrate or be extensively trained in chemometrics.

5. No in-house calibrations or expensive calibration data bases are necessary.


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