IAS Introduces Free UVT Testing: Enhancing UV Disinfection Efficiency

January 28, 2024
IAS Introduces Free UVT Testing: Enhancing UV Disinfection Efficiency

IAS now offers UVT testing service at no charge, to allow our customers to accurately assess the UV transmittance (UVT) of their water. Understanding UVT is crucial for optimizing UV disinfection efficiency in aquatic systems. By offering this free service, Integrated Aqua Systems aims to support our clients with the right information to make informed equipment selections and ensure the highest level of pathogen control.

To understand the importance of UVT testing, it's essential to comprehend the mechanism of UV disinfection. UV-C light, when absorbed by microorganisms' DNA, induces a structural change that renders them incapable of replication. This interruption in their reproductive cycle prevents the spread of diseases. The effectiveness of UV disinfection is measured in terms of log reduction, indicating the percentage of pathogens eliminated:

  • Log-1 = 90% effective
  • Log-2 = 99% effective
  • Log-3 = 99.9% effective
  • Log-4 = 99.99% effective
  • Log-5 = 99.999% effective

UV transmittance refers to the amount of germicidal UV-C light that penetrates the water within a UV sterilizer. However, several factors can significantly degrade UVT, thereby reducing the efficiency of UV sterilization. These factors include:

  1. Shielding - Turbidity: Turbidity caused by suspended particles, such as sediment or organic matter, can block or scatter UV light, preventing it from reaching microorganisms effectively.
  2. Absorption - Common UV Absorbing Chemicals in Aquariums: Certain substances commonly found in aquatic environments can absorb UV-C light, diminishing its effectiveness. These include organics, chelating agents, halogen stabilizers, pharmaceuticals, water additives/conditioners, and minerals like iron.

UVT plays a crucial role in determining the performance of UV disinfection systems. A UVT of 90% is typical for many public aquarium exhibits. At this level, approximately 36% of a UV system's original operating capacity is lost. The lower the UVT, the less effective the UV sterilization process becomes, and the greater the risk of incomplete pathogen control.

Percent UV Transmittance Chart:

Example of 780 Watt UV System operated at 150 GPM.

Our Free UVT testing service, gives our clients the tools and understanding to make the appropriate UV selection for their application. Accurate technical sizing criteria enables operators to make informed decisions regarding UV system design, operation, and maintenance. By identifying any UVT-related challenges, clients can take appropriate measures to improve disinfection efficiency, optimize system performance, and ensure the highest level of pathogen control in their aquatic systems.

Contact us today to inquire about free UVT testing from IAS.


Office Tel: (760) 745-2201