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NIR Spectrometer Systems for Process Control
Polytec PAS spectrometers are the ideal solution for online NIR testing of chemicals or nutrients for process control. The transmission grating design and diode array detector technology enable the measurement sensitivity, speed, and stability that Polytec customers value.
Contact or non-contact sensors independently connected to the spectrometer with long fiber optics allow the systems to be flexibly installed in many different situations. An optional multiplexer enables up to 6 measurement points at a low cost per sensor.
PAS spectrometers are available in multiple controllers with either a 110-240 VAC or 10-30 VDC actively stabilized power supply for flexible installation in manufacturing or outdoor mobile applications, like a truck, conveyor, grain harvester, etc.
Highlights
Uniform diffraction-limited spectral resolution, very low scattered light, high sensitivity, and long-term stability
Fast measuring times
Contact and non-contact sensors for testing solids
Process Control software with any standard contol system interfaceincluding MODBUS, Ethernet/IP, Profibus, and others
All software enables open access to data in text or other accessible format. Free instrument control drivers.
Image Credit: Polytec
NIR Spectrometers for Industrial Process Control
Polytec NIR Spectrometers for Industrial Process Control
Video Credit: Polytec
Different Models
PAS 1720/1721 and 1751
The compact diode array spectrometers (256 or 512 pixels) are fitted with TE cooling and cover a wavelength ranging from 850 nm to 1650 nm. They are either available in the 19″ housing (PAS 1720) or the ½ 19″ housing.
PAS 2120/2121
These diode array spectrometers (256 pixels) also have TE cooling and could be utilized in a wavelength ranging from 1100 nm to 2100 nm. The PSS 2120 is combined in the 19″ housing, while the PAS 2121 has been combined in the ½ 19″ housing.
Technical Data
Source: Polytec
| Model | Wavelength 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 |
NIR Spectrometer for Process Monitoring
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