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Products 
Process Spectrometers
MODULAR CONCEPT FOR RELIABLE PROCESS MONITORING

Polytec PAS spectrometers provide the ideal solution to your NIR process analytics problems. Diode array detector technology combined with a transmission grating design means the devices can be used for fast and reliable data acquisition. Flexible combinations with fiber-coupled components allow for integration in various measurement scenarios to suit the user’s requirements. Thanks to standardized components, no compromises need to be made with regard to precision and user-friendliness.
PAS spectrometers are available in a 19” plug-in housing with a 110 – 240 VAC power supply for installation in industrial cabinets. Small ½ 19” controllers with an actively stabilized (10 – 30 VDC) power supply are also available. They are particularly suitable for mobile applications on harvesters, for example.

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” housing (PAS 1720) or in the ½ 19” 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 PAS 2120 is integrated in the 19” housing, while the PAS 2121 is integrated in the ½ 19” housing.

  • 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

Technical Data

PAS 1720: 

  • Spectral range 850 nm to 1650 nm

  • 19” housing

  • Detector: 256 pixels

PAS 1721: 

  • Spectral range 850 nm to 1650 nm

  • ½ 19” housing

  • Detector: 256 pixels

PAS 1751: 

  • Spectral range 850 nm to 1650 nm

  • 19” housing

  • Detector: 512 pixels

PAS 2120: 

  • Spectral range 1100 nm to 2100 nm

  • 19” housing

  • Detector: 256 pixels

PAS 2121: 

  • Spectral range 1100 nm to 2100 nm

  • ½ 19” housing

  • Detector: 256 pixels

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Accessories and components

  • Various scan heads

  • Optical fibers

  • Software modules

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