Model 508plus UV-VIS Process Analyzer

GUIDED WAVE’S Model 508plus Process Analyzer is a single or multi-channel, fiber optic, UV-Vis spectrometer system designed for use in process environments. Configurable with up to 4 channels, the Model 508plus comes in a NEMA 4x enclosure with built-in thermal control to ensure the most consistent performance possible while in 24/7 service mode. Up to 16 parameters may be monitored on each channel making it suitable for many applications in chemical and polymer plants, refining and petrochemical, pharmaceuticals and other specialty chemicals, paints and varnishes, adhesives, wastewater management, biotech, etc. It has a built-in computer control unit with optional touch screen for convenient user interface.

Model 508plus UV-VIS Analyzer


  • High sensitivity 2048 Pixel Diode Array Spectrometer
  • Built-in compact Xe fl ash UV-Vis light source
  • Rapid data collection
  • Built-in Instrument Control Unit with door mounted touch screen
  • Analyzer control program developed in LabVIEW™ featuring customizable settings and trending capability
  • Modbus Ethernet TCP/IP communications with built-in event setup
  • Optional Opto-22 panel and communications for 4-20 mA analog and discrete interfacing
  • 16 Analog Inputs for temperature and pressure correction of vapor/gas streams (requires Modbus or OPTO 22)
  • Compatible with Guided Wave’s proven probe and flow cell products
  • Fully insulated NEMA 4 or 4X enclosure with built in Internal Thermal Control
  • Full spectrum scanning, 200 nm to 850 nm
  • Multi-channel design from 1 to 4 channels
  • Individual pulsed Xenon source on each channel
  • Unscrambler® Calibration Model Ready (with optional Unscrambler Predictor)
  • Simple B-Vector and formulaic models
  • Built-in Color Analysis
  • User definable prediction engine
  • File formats – GW ASCII/BINARY and Grams SPC


  • Class I Div 2 Groups C & D, Z-Purge
  • Class I Div 1 Groups C & D, X-Purge (No touch screen for Div I)
  • SNAP I/O analog and discrete communications package by Opto-22 (Modbus Ethernet TCP/IP)
  • Unscrambler® Predictor for expanded modeling capabilities
  • Compatible with 400, 500 and 600 μm diameter UVSR fiber


  • L*a*b* and other color coordinates
  • Solvent recovery purity
  • Maleic acid in tetrahydrofuran (THF)
  • Trace (ppm level) impurities in wash water; Clean-In-Place for Pharma
  • Polynuclear aromatics (PNAs) in middle distillates
  • Phenol in cyclohexanone
  • Sodium hypochlorite in bleach solutions
  • Aromatics in monomers
  • Benzene in cyclohexane
  • Saybolt or ASTM color of diesel and jet fuels
  • Toluene diisocyanate in polyurethane
  • UV inhibitors in polymers
  • Antioxidants in polymers and plastics
  • Color and clarity of varnishes
  • Halogens and various halogenated compounds in vapor streams
  • Sorbic acid in water
  • Ferrous chloride in acid
  • Acetonitrile purity
  • Hypochlorous acid

Reliable, Rugged, and Flexible

By partnering with Guided Wave you gain the advantage of 35+ years of experience in online process monitoring and stream sample analysis. Our entire product line is designed and developed to meet the challenges of the most demanding production environments. The Pulsed Xenon source lamp used in the Benchtop 508plus has a lifetime lasting over two years.

Specifications: 508plus UV-Vis Process Analyzer – Spectrometer

Analyzer TypeUV-Vis Spectrometer, Transmission Grating, High Sensitivity Diode Array
Bandwidth < 3 nm
Channels1-4, Independent, Sequentially Scanned
CommunicationsModbus TCP over Ethernet or Serial RTU Optional analog and digital I/O w/OPTO 22 panel via Modbus TCP Ethernet
Compatible Fiber DiametersBetween 200 μm and & 600 μm; 400 μm standardInternal Instrument Control Unit (ICU)
Compatible Fiber Type or Fiber optic cable ?
Dimensions Enclosure (w x d x h)General Purpose: 30”x 24” x 17.7” [60 cm x 45 cm x 73.5 cm]
Dynamic Range2000:1 for a single scan
Enclosure OptionsNEMA 4 or NEMA 4x, IP66
Environmental0 °C - 45°C sun shade required
Ethernet10/100/1000 Mbps
Fiber Optic Cable High-OH Deep-UV-Solarization Resistant
Fiber Optic Cable ConnectorsSMA 905
Hazardous Area OperationZ-Purge (CI, D2), X-Purge (CI, D1), ATEX (contact factory)
Humidity0-100% rain shelter required
Internal Instrument Control Unit (ICU)Internal w/solid state drive (call factory for specifi cations)
Internal Temperature Control32 °C ±0.5 °C
Light Source / Life2W pulsed Xenon Lamp / > 2 years
Operating SystemWindows® embedded
Photometric Noise< 0.8 mAU @ 0 AU, 550 nm, 1 sec
Power Requirements110 or 220 Vac 50/60 Hz, 1500 W
Product Name508 plus
Product Part Number ?
RoHs CompliantYes
Scan Time (Dual Beam)5 milliseconds (minimum scan time)
Software RequiredGW5080S UV-Vis Operating System (see document #7005)
Stray Light < 1 % <0.1% @ 220 nm
Touch Screen Monitor15” [38 cm] XGA 1024 x 768 color (General Purpose & Class I, Division 2 only)
Warranty2 year limited warranty
Wavelength Accuracy±0.1 nm
Wavelength Precision (Repeatability)
Wavelength Range200 nm – 850 nm
Weight~ 200 lbs [91 kg]