INFICON WHISPER – Ultrasonic leak detector


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INFICON Whisper includes heterodyne capability, which reduces the ultrasonic frequencies detected to a range that the human ear can detect. As a result, variations can be identified to easily pinpoint the ultrasonic source. When headphones (included) are plugged into the detector, heterodyne output is enabled. An entrepreneurial touch pad is used to adjust sensitivity. When heterodyne mode is not enabled, multiple LEDs and an audible alarm detect the leak.

Whisper is ideal ultrasonic leak detector for detecting and locating ultrasonic frequencies generated when the following common situations occur:

  • Leaks of any gas under pressure or vacuum
  • Electrical arcing
  • Worn bearings and machinery
  • Malfunctions in steam traps
  • Leaking seals

Use Whisper Transmitter to test seals around any enclosed space, including doors, windows, ducts and refrigerator cases. Simply turn on the Whisper Transmitter to generate an ultrasonic tone and place it in the area to be tested for leaks. Whisper can be used to trace around potential problem areas to alert you to the transmitter’s ultrasonic frequencies “leaking” through poorly-sealed areas.


  • Made in the USA
  • Two year replacement warranty


  • Verstility for a variety of applications and industries
  • Works on any gas under pressure or vacuum


  • Refrigerant leaks
  • Nitrogen leaks
  • Locating worn bearings
  • Leaks in pneumatic systems
  • Compressed air lines
  • Vacuum systems
  • Diagnosing solenoid operation
  • Electrical arcing
  • Steam traps


HystrongICL is a leading distributor of INFICON instruments in Vietnam, with an experienced technical team

Contact HystrongICL for more information! Contact now>>>

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Hotline: (+84) 865.733.288 (call/zalo)

Type Whisper
Base unit includes
  • Headphones
  • Rubber extension probe
  • Two “D” alkaline batteries
  • Hard plastic carrying case
Unit with accessory kit includes
  • Premium headphones
  • Metal contact probe
  • Rubber extension probe
  • Whisper Transmitter (with 9V battery)
  • Two “D” alkaline batteries
  • Hard plastic carrying case
Controls Power button, sensitivity touch pad
Power source Two D size alkaline batteries (included)
Battery life 165 hours (laser pointer off)
115 hours (laser pointer on)
Weight with batteries 1.06 lb. (482 g)

Part Numbers

Part Number Description
711-202-G1 Whisper, English Manual
711-202-G4 Whisper, Japanese – QSG, No Diode/Laser
711-202-G11 Whisper, Euro Manual
711-203-G1 Whisper with Accessories, English Manual
711-203-G11 Whisper with Accessories, Euro Manual


Part Number Description
032-0430 Headphones
032-0427 Premium Headphones
711-703-G1 Spare Contact Probe With O-Ring
711-600-G1 Ultrasonic Transmitter, Whisper



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