Chemtrac UVM5000 UV254 Organics Monitor

The UVM5000 provides online continuous organics monitoring utilising a 254 nm ultraviolet light source. The amount of light absorbed provides an ongoing indication of natural organic matter (NOM) in a flowing sample, and serves as a continuous surrogate measurement for total organic carbon (TOC). More specifically, UV254 is the best detector of aromatic or reactive organics which when combined with chlorine, can form disinfection by-products (DBPs). The patent pending Ortho-Beam technology provides many significant advantages while maintaining affordability. The monitor’s unique ability to automatically detect and compensate for UV lamp fluctuations and quartz fouling minimises losses in accuracy over time, and significantly reduces maintenance.



  • Surrogate measurement for TOC/DOC
  • Reduced need for cleaning
  • Continuous compensation for lamp drift and cuvette fouling
  • No reagents
  • Much lower cost than other online organics monitors
  • Very low maintenance costs


  • Water Treatment
    • Detect changes in coagulant demand
    • Monitor organics removal
    • Optimise UV disinfection systems
    • Monitor potential for disinfection byproducts (DBPs)
  • Distribution System Monitoring
    • Detect system contamination
  • Wastewater Treatment
    • Monitor effluent discharge