Polytec PAS industrial NIR spectrometer with fiber-optic probe for real-time process analytics in food and agriculture industries.

Scalable multi-point NIR spectrometer

Our PAS is a high-performance NIR analyzer for multi-point and real-time process analytics in food, feed and agriculture industries. 

The PAS is the NIR analyzer for multi-point process monitoring

The PAS spectrometer provides fast and precise data acquisition for inline NIR process analytics. Based on a transmission grating design with diode array detector technology, it delivers fast and reliable data with an industrial-fitting uptime.

  • Lowest cost per measurement point; one spectrometer serves up to six
  • High accuracy and long-term stability
  • Easy process-integration of fiber-coupled sensor heads
  • For solids, liquids or pasty materials
  • Simple control system integration via standard protocols
Polytec PAS spectrometer with a multiplexer unit connecting up to six NIR sensor heads
PAS with the multiplexer unit to connect up to 6 probes.

Get in touch with our experts

Our specialists will help you to find and select the proper setup of a NIR analyzer and software to fit your materials and process.

Highlights of the PAS spectrometer

Capable of measuring parameters such as moisture, fat, protein, starch and more, the PAS is built for 24/7 continuous monitoring across up to six measurement points.

Low costs per measurement point
One spectrometer can serve up to six sensor heads with a multiplexer
High measurement rate
Diode-array readout with no moving parts, for high throughput
Integrated shutter
for dark signal measurement and long-term stability
Spectral resolution < 8 nm
Uniformly high optical resolution across the entire spectral range
High sensitivity 
Transmission design with extremely low scattered light (contrast ratio > 1 : 50.000)
Two spectral ranges
with 850-1650 and 1100-2100 nm for process and material demands

Applications in process control 

The PAS advanced spectrometer is particularly suitable for monitoring critical parameters in food and feed production, agriculture and related industries. It supports high precision inline measurement of various parameters and with up to 6 measuring points (via a multiplexer) ensuring consistent product quality and optimized process efficiency. 

Measuring various parameters in your process as:

  • moisture, fat, protein, starch, sugar,...
  • in/at conveyor belts, pipes, storage vessels, hoppers, ....

Used in multiple industries / applications as feed mills, bakeries, chips & snacks production, dairy processing, beverages,....

Features of the PAS NIR spectrometer

The PAS spectrometer is a versatile tool for process optimization and quality assurance across processing industries. Because one spectrometer covers up to six measurement points, the cost per measurement point falls with every point added. The PAS has been successfully implemented in food and beverage production, agriculture and feed, as well as polymer processing and recycling industries. 

  • With the multiplexer unit, up to 6 sensor heads can be connected
  • Extremely low scattered light levels
  • Uniform optical resolution at the theoretical limit
  • Bandwidth of 850 to 1650 nm or 1100 to 2100 nm
  • SMA 905 fiber connectors and Ethernet interface
  • Actively cooled diode array for optimum signal-to-noise ratio

Related products to build your multi-point NIR analyzer solution 

Get in touch with our experts

Our specialists will help you to find and select the proper setup of a NIR analyzer and software to fit your materials and process.

Technical data of the PAS models

The PAS spectrometer series is available in different spectral ranges.

ModelSpectral rangeHousing in inchDetectorResolution
PAS 1720850 to 1650 nm19256 Pixelfrom < 6.4 nm
PAS 1721850 to 1650 nm½ 19256 Pixelfrom < 6.4 nm
PAS 21201100 to 2100 nm19256 Pixelfrom < 7.9 nm
PAS 21211100 to 2100 nm½ 19256 Pixelfrom < 7.9 nm
Polytec PAS NIR spectrometers in blue housings, designed for fast, precise near-infrared process analytics in industrial settings.
Polytec PAS spectrometer with flexible fiber-optic probe for precise NIR process analytics in food and agriculture industries.
Polytec PAS NIR spectrometer featuring transmission grating design and diode array detector for precise process analytics.
Close-up of Polytec PAS spectrometer rear panel showing cooling fan, power input, sensor and fuse ports with labels.

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Just need a single-point measurement NIR analyzer?

The PCS is a compact, industrial NIR spectrometer for fast, reliable, and cost-effective inline process monitoring. Capable of measuring at a rate of 40 scans/second and ensures 24/7 continuous monitoring with zero downtime.

Polytec compact spectrometer PCS with distance and contact sensor heads for single-point measurement

Get in contact with our experts and discuss your process monitoring demands and ideas

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