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

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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

PAS-H-A03 Distance Sensor Head
The PAS-H-A03 distance sensor head is a reflection sensor head for non-contact sample measurement at distances between 100 and 500 mm.

PAS-H-B04 Contact Sensor Head
The PAS-H-B04 contact sensor head is a reflection sensor head which allows you to measure samples over short distances.

Multiplexers for process spectrometers
The Multiplexer solution allows the user to perform spectrometer-based measurements with several and even different probes at various points during the process. This enables flexible and affordable integration for a wide range of applications.
Get in touch with our experts
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.
| Model | Spectral range | Housing in inch | Detector | Resolution |
|---|---|---|---|---|
| PAS 1720 | 850 to 1650 nm | 19 | 256 Pixel | from < 6.4 nm |
| PAS 1721 | 850 to 1650 nm | ½ 19 | 256 Pixel | from < 6.4 nm |
| PAS 2120 | 1100 to 2100 nm | 19 | 256 Pixel | from < 7.9 nm |
| PAS 2121 | 1100 to 2100 nm | ½ 19 | 256 Pixel | from < 7.9 nm |




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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.

