A reliable solution for demanding process analytics
The Polytec PAS spectrometer provides fast and precise data acquisition for NIR process analytics. Based on a transmission grating design with diode array detector technology, it delivers high accuracy and long-term stability even in demanding industrial environments. Flexible fiber-coupled probes and standardized components make it easy to integrate into a wide variety of measurement scenarios – from single-point to multipoint monitoring. Whether you analyze solids, liquids or pasty materials, PAS spectrometers ensure robust results and maximum user-friendliness.
Two spectral ranges available
Get in touch with our experts
Get in touch with our experts
Our specialists will help you design the right NIR solution for your process.
Highlights of the PAS spectrometer
//- Innovative transmission grating design
- High measurement rates due to very short measuring times
- Superior sensitivity and long-term stability
- Uniformly high optical resolution across the entire spectral range
- Extremely low scattered light levels
- SMA 905 fiber-optic connector
- Ethernet interface
- Various scan heads, optical fibers and software modules
Flexible integration for diverse industries
The PAS spectrometer has been successfully implemented in food and beverage production, agriculture and feed, as well as polymer processing and recycling. Its modular setup allows the use of different probes and multiplexing options, enabling efficient monitoring at multiple points along the production line. This makes the PAS a versatile tool for process optimization and quality assurance across industries.
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PAS NIR spectrometer models and technical data
PAS 1720/1721 and 1751
The compact diode array spectrometers (256 or 512 pixels) are equipped with TE cooling and cover a wavelength range of 850 nm to 1650 nm. They are either available in the 19 inch housing (PAS 1720) or in the ½ 19 inch housing.
PAS 2120/2121
These diode array spectrometers (256 pixels) also have TE cooling and can be used in a wavelength range of 1100 nm to 2100 nm. The PSS 2120 is integrated in the 19 inch housing, while the PAS 2121 is integrated in the ½ 19 inch housing.
Technical data
| Model | Wavelenght 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 1751 | 850 to 1650 nm | ½ 19 | 512 Pixel | from < 4.0 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 |
Get in touch with our experts
Get in touch with our experts
Whether in food production, feed and agriculture or on-harvester applications, Polytec NIR spectrometers deliver reliable real-time results. Our experts will help you identify the ideal setup for your process and application.
