Dye Tracing (Rhodamine & Fluorescein)

Monitoring the dilution and movement of a tracer introduced into the water column provides an excellent means of determining the path that may be followed by a discharge and the rate at which dilution is likely to take place. Fluorescent dyes such as Rhodamine, Fluorescein or Agma are the most frequently used tracers for such investigations.  CTG has been providing dye tracing systems since 1982. The CTG systems can be configured for a wide variety of tracers, are highly sensitive, robust, and deliver real-time data.

Product of choice:

UniLux Fluorometer: Low cost miniaturised, digital fluorometers to monitor Chlorophyll a, Phycoerythrin, Rhodamine WT, Phycocyanin, Fluoroscein or Nephelometer.UniLux Dye Tracing Sensor: Dye tracing operations are common in determining water retention and flow in newly commissioned or modified Waste Water Treatment Works.  CTG can offer portable systems based on the UniLux in situ fluorometer configured to measure common dyes used in such practices as Rhodamine WT or Fluorescein. 


Typical applications include:

  • Dye tracing operations to determine water retention and flow in newly commissioned or modified Waste Water Treatment Works
  • Discharge monitoring into rivers and estuaries
  • Sewer and storm water drainage analysis
  • Natural water flow analysis (rivers, lakes, ocean currents, cave water flows, groundwater filtration etc)
  • Pollution studies
  • Cross-contamination
  • Borehole connectivity


Dye tracing soluctions to monitor water retention and flow in Waste Water Treatment Works & natural water 


Contact Us:

55 Central Avenue
West Molesey

Tel: +44 (0)20 8481 9000
Fax: +44 (0)20 8941 9319

Join our mailing list