• ULD-405
  • Usually ships in 1-2 weeks



  • 20 to 90 kHz frequency range
  • 75 mA typical power consumption
  • -4 to 122°F (-20 to 50°C) operating temperature
  • <80% RH operating humidity
  • 2.5in LCD display with bargraph
  • 8-level sensitivity adjustment
  • Detachable tubular extension for hard-to-reach areas
  • IP40

What's in the Box

  • Receiver
  • Earbuds (for use with hard hat)
  • PB-1 power parabola
  • TEA-1 flexible tubing adapter
  • TE-1 tubular extension
  • Soft carrying case
  • 4 x AA batteries


The Amprobe ULD-405 ultrasonic leak detector is designed for easy inspection and troubleshooting. When equipment begins to fail due to an air leak or vibration, the leakage point emits an ultrasonic sound wave that is above the natural range of human hearing. The ULD-405 converts this ultrasonic sound into a signal that can be used to pinpoint the exact location of the equipment failure. The ULD-405 finds air leaks that decrease performance, incur additional power consumption, and require more energy to compensate lost pressure. The large LCD bargraph clearly shows the strength of the leak, allowing the user to easily identify its source and to use the headphones to hear the converted audible sound.

Amprobe ULD-405 Ultrasonic Leak Detector Applications

  • Compressed air or other gases (except combustible gases)
  • Plumbing
  • Electrical and mechanical systems
  • Valves, tanks and pipes
  • Heat exchangers, boilers and condensers
  • Air conditioning and refrigeration systems
  • Motors and machinery
  • Automotive repair