Amprobe ULD-405 Ultrasonic Leak Detector

  • Adjustable Receiver sensitivity for accurate leak pinpointing
  • 20 kHz to 90 kHz frequency range: optimal range for detecting a variety of leakage events
  • 2.5” LCD display with bargraph
  • Parabola accessory directs the ultrasound towards the sensor
  • Detachable Tubular Extension provides additional reach in hard to reach areas
SKU: 5236025 Category:


When equipment begins to fail due to an air or gas leak or vibration, or electrical discharge, the leakage point emits an ultrasonic sound wave that is above the natural range of human hearing. The ULD-405 Ultrasonic Leak Detector converts this ultrasonic sound into a signal that can be used to pinpoint the exact location of the equipment failure. Find air leaks that drop down performance and incur additional power consumption, requiring more energy to compensate lost pressure. See the strength of the leak clearly on the large LCD bargraph and identify the source of the leak by listening to the converted audible sound emitted via the earbuds.


  ULD-405-R Receiver
Sensitivity Adjustment Yes
Volume Adjustment Yes
Earphone Jack (3.5 mm) Yes
Display Size LCD 2.5 in (6.35 cm)
Display Dimensions 1.45 x 1.93 in (36.72 x 48.96 mm)
Display Resolution 240(RGB) x 320 pixels
Display Type TFT-LCD (262 K)
Display Color True, 16bit/color
Frequency Range 20 kHz to 90 kHz
Power Supply 4 x 1.5 V AA (LR6) alkaline batteries
Power Consumption (typical) 75 mA
Battery Life (typical) 105 hours (Alkaline)
Low Battery Indication
Weight Approx. 0.518 lb (0.235 kg)
Dimensions 7.547 x 2.984 x 1.791 in (183 x 75 x 43 mm)
APO function 60 minutes when in idle
Operating Temperature -4 °F to 122 °F (-20 °C to 50 °C)
Storage Temperature -4 °F to 158 °F (-20 °C to 70 °C)
Operating Humidity <80% RH
Pollution Degree 2
Protection IP40
Electromagnetic Compatibility (EMC) EN 61326-1
Korea (KCC): Class A Equipment (Industrial Broadcasting & Communication Equipment) [1]
[1] This product meets requirements for industrial (Class A) electromagnetic wave equipment and the seller or user should take notice of it. This equipment is intended for use in business environments and is not to be used in homes.


ULD-405 Overview

Find ultrasonic leaks easily with the ULD-405.

What's Included

  • 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


Datasheet »
User Manual »


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