Model 6000

Ultraviolet Photometric Analyzer​​​​


The 6000 Series Microprocessor Controlled Ultraviolet Photometer is designed to provide continuous on-line analytical data of critical process conditions and eliminate time consuming laboratory analysis. This analyzer can be configured to measure at any wavelength within the ultraviolet or visible portions of the electromagnetic energy spectrum. Since numerous gases and liquids have a useful absorbance peak in the ultraviolet region, a wide variety of applications are possible.

Principle of Operation

The analyzer’s optical path consists of a UV source, sample cell and detector. A filter wheel located in front of the detector continuously rotates a reference and measuring filter in and out of the optical path. The material of interest continuously flows through the sample cell where the optical energy is absorbed at various wavelengths in accordance with its composition. The analyzer utilizes the reference wavelength to compensate for extraneous phenomena (turbidity, dirt on optics, source drift, etc.) thereby producing a high degree of stability over long periods.


  • 6000: General purpose wall mount

  • 6020: Totally explosion proof, suitable for use in Class I, Div 1 Groups B, C and D

  • Alternate configurations are available; contact the factory​


  • Dependable microprocessor-controlled analysis

  • Auto calibration and auto ranging

  • Continuous real time analysis

  • Eliminates time-consuming lab analysis​


  • Microprocessor based, high resolution, ultra stable electronics (no potentiometers)

  • Three user-selectable ranges

  • Signal and Range ID output: 0-1 VDC and 4-20 mADC (isolated)

  • Range ID contacts (qty. 4) Form A normally open contacts, 3A @ 250 VAC resistive

  • Two adjustable concentration alarm set points with programmable relay function Form C contacts, 3A @ 250 VAC resistive

  • Programmable auto ranging

  • Programmable auto calibration with mode ID Form A normally open contacts

  • Remotely operated calibration (customer supplied valves and 24 VDC signals

  • Self diagnostics with Form C failure contacts

  • Full duplex RS-232 communication link

  • Alphanumeric VF display for set-up and diagnostics

  • Power: 115/230 VAC 50/60 Hz​



​< ± 1% of full scale


​< 1% per 20°F


​< 1% per day


​± 2% of full scale


​0.02 to 3 absorbance units


​± 1% of scale or better

​Flow Rates

​50 to 1500 cc/min

​Response Time

​90 seconds


​32° to 122°F (0° to 50°C) non-condensing

​Sample Cell

​Stainless steel with quartz window standard
Other materials available

​Cell Length

0.01 to 40 inches (application dependent)

​Light Source

​Tungsten lamp, mercury, deuterium arch (application dependent)

​Filter Wavelength

210 to 1000 nanometers

​Sample Pressure

​Quartz window - 3 PSIG
Sapphire - 40 PSIG


2-line alphanumeric vacuum fluorescent display (VDC)​


​115/230 VAC, 50/60 Hz volts, approximately 200 watts


​6000:     General purpose - sheet steel
6020:     Hazardous duty - condulet​