Ultrasonic Leak Detector

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  • "Hears" the ultrasonic noise created by any pressurized gas moving through a small orifice, regardless of type: CFC's, HFC's, nitrogen, etc.
  • Unaffected by contaminants or windy conditions
  • Parabola PB-1 dramatically reduces background noise
  • Detects the ultrasonic noise caused by arcing electrical switchgear or worn bearings
  • Combined with the H25-845 UT-300 transmitter, the ULD-300 has a variety of applications; tests the "air-tightness" of enclosed spaces such as tanks, cars and houses, or duct work
  • Includes parabola, tubular extension and adapter, headphones, 9V battery and carrying case


Frequency response: 35 kHz to 45 kHz + 6dB |Battery life: 9V alkaline batteries, 33 hours |Performance: meets the A.S.T.M. standard |Battery test: LED color — green indicates it’s good, red means replace

Product Specifications

Shipping Weight1.90
Shipping Width12.20
Shipping Length10.40
Shipping Height5.60

Compliance & Notes

Harmonize Code9027.10.2000

See catalog page 1206 for additional notes and/or restrictions.

Warranty Information

WARRANTY - Johnstone Supply will administer and promptly process all warranties in accordance with the manufacturer's specific warranty policies and procedures.

WHOLESALE ONLY - Identification is required of purchasers. Possession of Johnstone's catalog does not constitute an offer to sell by Johnstone or the right to purchase from us.

RETURNS - All returns are subject to a restocking charge.

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See other: Amprobe - Ultrasonic Leak Detectors
See all: Amprobe Products

Mfg. #: ULD-300