NIR Process Control Spectroscopy Systems

Near Infra-red (NIR) spectroscopy is a proven technique for online process control and laboratory measurement applications. We have a wide range of NIR solutions from Polytec GmbH to help you achieve your goals.

Polytec Spectrometer Systems (PSS) are modular in concept and designed to offer flexibility as well as measurement precision. Standardised sensor heads, spectrometers and process software packages provide a powerful tool for qualitative and quantitative online analysis – three parts of the jigsaw, linking together to give you a complete measurement solution.

NIR Process Control Spectroscopy Systems

High flexibility
Easy integration
Robust design
Simplified operation
Fast and reliable data
Productive, cost-effective, and convenient

Sensors

Adequate sample presentation is the key to a successful solution. We have a wide variety of specialised sensor heads to accommodate all possible sample properties and installation situations.

PSS SENSOR HEADS Datasheet

Distance Reflection Sensor Head PSS-H-A03

Combined illumination and sensor unit for distances varying from 150 to 600 mm. Ruggedised and suitable for conveyor belts, web applications etc.

Fully automated system calibration
Adjustable measurement spot size
Integrated 20 W tungsten-halogen light source for sample illumination
SMA 905 optical fibre connection
Industrial protection class IP64
Stainless steel housing

Contact Reflection Sensor Head PSS-H-B01

Combined illumination and sensor unit for for distances varying from 0 -50 mm. Ruggedised and suitable for tubes, chutes, funnels, etc.

Fully automated system calibration
Adjustable measurement spot size
Integrated 20 W tungsten-halogen light source for sample illumination
SMA 905 optical fibre connection
Industrial protection class IP64
Stainless steel housing with sapphire window

Immersible Reflection Probe PSS-H-CR1

For measurements in liquids and other fluid samples Polytec's PSS-H-CR1 immersible reflection probe is the right choice. These probes are available in versions compliant to food laws or ATEX.

Robust stainless steel design with sapphire window
Special "9 around 1" fibre configuration for superior SNR
Compliant to food laws, ATEX etc.
Standardised system referencing
Variable flanges for convenient installation

Immersible Transmission Probes PSS-H-CT1

A variety of different fibre coupled standard transmission or ATR immersible probes can be offered.

Fibre Sensor Heads

A series of fibre sensor heads with adjustable spot size and working distance. They are best suited for single pass transmission measurements of gases, or passive detection of thermal radiation such as hot steel or glass.

Achromatic optics with AR coating
Adjustable spot diameters and distances (i.e. variable d/D ratio)
Suited for high environmental temperatures (<280°C)
SMA 905 optical fibre connection
Options for use as a illumination head with integrated light source
Gas tight option

Fibre Sensor Head	A/R Coating	Distance
PSS-H-117	850 - 1650nm	f=50mm
PSS-H-217	850 - 1650nm	f=25mm
PSS-H-125	1100 - 2500nm	f=50mm
PSS-H-225	1100 - 2500nm	f=25mm

Spectrometers

Polytec PSS Near Infra-red (NIR) spectrometers offer an optimised solution for process analytics.

PSS SPECTROMETERS Datasheet

Diode array technology combined with superior transmission grating design allows PSS spectrometers to provide fast and reliable data acquisition. Flexible integration in various measurement scenarios is enabled by the use of fibre coupled sensors.

Polytec’s design and manufacturing approach ensures each spectrometer is compatible with the next. This allows chemometric model calibrations to be easily transferred between systems.

Polytec PSS Near Infra-red spectrometers

Standardised spectral ranges between 550nm and 2500nm
Innovative transmission grating design
High measurement rate
Superior sensitivity and long term stability
Uniform optical resolution at the theoretical limit
Extremely low scattered light levels
SMA905 fiber connectors
Ethernet interface
110-240 VAC power supply
Optional 10-30 VDC power supply with active stabilisation

Model	Wavelength Range	Detector	Pixels	Resolution
PSS 1050	550 – 1000 nm	Si	512	< 3.6 nm or < 5.4 nm
PSS 1720	850 – 1650 nm	InGaAs	256	< 6.4 nm or < 9.5 nm
PSS 1750	850 – 1650 nm	InGaAs	512	< 3.2 nm or < 4.8 nm
PSS 2120	1100 – 2100 nm	InGaAs	256	< 7.9 nm or < 11.9 nm
PSS 2220	1200 – 2200 nm	InGaAs	256	< 7.9 nm or < 11.9 nm
PSS 2520	1300 – 2500 nm	InGaAs	256	< 9.5 nm or < 14.2 nm

Software

We have a range of software packages for laboratory data acquisition, multivariate data analysis and process control; depending upon application requirements.

PSS SOFTWARE Datasheet

PSS-S-DRV Driver Package

Hardware driver package to integrate PSS spectrometers with external software solutions.

C++ driver dll for basic instrument access
COM object provides pre-configured properties for fast and easy implementation
ActiveX control for high level instrument access incl. graphical user interface

PSS-S-AXC Laboratory Software

Software package for automated basic system operation and data acquisition.

C++ driver dll for basic instrument access
COM object provides pre-configured properties for fast and easy implementation
ActiveX control for high level instrument access incl. graphical user interface

PSS-S-POP Process Software

Software for process control, including chemometric prediction, visualisation, and interfacing to PLC’s

Fully automated system operation
Configurable user interface (administrator and user levels)
Sophisticated data pre-treatment
Online chemometric predictions
Warning and alarm thresholds
Supports numerous analogue and digital PLC interfaces

PSS-S-HOP Harvester Software

A dedicated software solution for agricultural applications, suitable for mobile harvesters and combines as well as stationary installations. It provides a comprehensive platform for analytical measurement tasks using chemometric methods.

Bidirectionally compatible to common field management software packages
Various user interfaces, optional remote control
Fully automated hardware operations
Sophisticated data pre-treatment and spectra filtering
Chemometric online predictions incl. enhanced outlier diagnostics
Automatic assignment of tracking information e.g. lot ID

Chemometric Software

Polytec spectrometer systems are fully compatible with standard chemometric software packages. These packages provide multivariate data analysis of spectroscopic measurements, method development, and online process analytic predictions.

We currently offer packages from the following partners:

Camo (The Unscrambler® X)
SensoLogic (Calibration Workshop)
Thermo Fisher Scientific (GRAMS)
Umetrics (Simca)

OEM

PSS-M Polychromator

The PSS-M polychromator is developed and manufactured by Polytec GmbH as a dedicated solution for original equipment manufacturers .

Transmission design for maximum sensitivity and extremely low scattered light (contrast ratio > 1:50000)
Integrated shutter for dark signal measurement
Uniform optical resolution at the theoretical limit
Pre-aligned and supplied with wavelength calibration data (?? < 0.5 nm)
Prepared for use with various sensor electronics)

Model	Wavelength Range	Detector	Pixels	Resolution
PSS 1050	550 – 1000 nm	Si	512	< 3.6 nm or < 5.4 nm
PSS 1720	850 – 1650 nm	InGaAs	256	< 6.4 nm or < 9.5 nm
PSS 1750	850 – 1650 nm	InGaAs	512	< 3.2 nm or < 4.8 nm
PSS 2120	1100 – 2100 nm	InGaAs	256	< 7.9 nm or < 11.9 nm
PSS 2220	1200 – 2200 nm	InGaAs	256	< 7.9 nm or < 11.9 nm
PSS 2520	1300 – 2500 nm	InGaAs	256	< 9.5 nm or < 14.2 nm

Customised Models

We can provide customised OEM solutions for system suppliers with special requirements. Services include:

Consulting and feasibility studies for technical and commercial evaluation
Optical design (spectral range, optical resolution, sensitivity etc.)
Development in terms of mechanical and electronic integration
Serial production

PSS-E Electronics

A dedicated add-on for the PSS-M polychromator, providing control and acquisition for OEM manufacturers.

32-bit electronics
Flash memory for system information
8 digital I/O ports for triggering and real-time process control
User-friendly and fast system operation via Ethernet

Accessories

Plug-in Units

Power supplies and fibre coupled light sources as plug-in units for the standard spectrometer housings.

Modules For PLC Interfacing

An extensive range of Fieldbus components for all common I/O and Fieldbus systems, allows us to select the bus system best suited to the particular application (e.g. 0-10V, 4-20mA, Profibus, RS232).