Spectroline Leak Detection

Spectroline Leak Detection from ZenTrade

By: ZenTrade   08/03/2010
Keywords: Leak Detection

A small amount of liquid
fluorescent dye is added to a circulating fluid system that is being inspected for leaks. The system is then run for a short time to allow the dye to mix and circulate with the host fluid.

The dye/fluid mixture escapes with the host fluid wherever there is a leak and glows a bright yellow/green when inspected with a high-intensity ultraviolet or UV/blue light lamp. This method is extremely effective in locating even the smallest, most elusive leaks, as well as multiple leaks.

Fluorescent Leak Detection
Applications (open and closed loop)

  • Lubrication systems
  • Hydraulic systems
  • Pipelines
  • Air conditioning and refrigeration systems
  • Cooling control and hydrostatic pressure systems
  • Fuel systems
  • Engines


  • Hydraulic systems are supposed to leak
  • Dyes cost too much
  • Hard to implement in large systems


  • Fast, easy and accurate
  • Finds all leaks—the first time, every time
  • Economical
  • Reduces labor costs
  • Perfect for preventive maintenance
  • Environmentally friendly
  • Safe
  • Improves working conditions
  • Decreases equipment downtime
  • Increases efficiency of machinery operation

Tech tips

  • Tanks often have a separate holding area where the oil is cooled. Therefore, inject the fluorescent dye into the dispensed area to ensure adequate circulation.
  • When put into large tanks, the dye should first be diluted with the oil so it quickly mixes.
  • When determining dye dosage, always base it on the capacity of the system, including lines and tank. In addition to the tank capacity, there is a significant amount of oil located in the lines.
  • Develop a dye service card specific to each application.
  • Include leak checking into your regular maintenance program.

Keywords: Leak Detection