Inficon Whisper Ultrasonic Leak Detector

Integral to Compass is the INFICON patented heated diode sensor technology, delivering outstanding sensitivity to all refrigerants yet resisting jobsite contaminants such as dust, dirt and oil.

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Inficon Whisper Ultrasonic Leak Detector

The Whisper Ultrasonic Leak Detector allows the user to check for pressure and vacuum leaks where other sniffer style leak detectors can’t go. With the unique internal noise control circuitry, the technician can operate Whisper in high noise environments.

The leak detector includes a specialized built-in receiver that detects frequencies in the 40.5kHz range. Through sophisticated circuitry, Whisper locates the ultrasound’s source, while an internal noise control ensures the instrument is unaffected by audible noise. This makes Whisper a versatile tool which can even be used in noisy environments, such as mechanical rooms.

Whisper incorporates heterodyne capability, which reduces the ultrasonic frequencies detected to a range that can be heard by the human ear. Variations can, therefore, be identified to easily pinpoint the ultrasonic source. The heterodyne output is enabled when headphones (included) are plugged into the detector. Sensitivity is adjusted through an innovative touchpad. Multiple LEDs and an audible alarm register the leak when the heterodyne mode is not enabled.

For the ultimate in performance and versatility, consider the Whisper with accessory kit. Along with the leak detector, this kit gives you more accessories for more productivity. Use the contact probe to check the machinery’s function. Simply twist the metal probe into the instrument and touch it to bearing housings, solenoids, pistons and other mechanical equipment to allow frequencies to travel into Whisper’s ultrasonic transducer. Properly functioning machinery sounds smooth and clear, a sharp contrast to malfunctioning machinery.

Use Whisper Transmitter to test seals around any enclosed space, including doors, windows, ducts and refrigerator cases. Simply turn Whisper Transmitter on to generate its ultrasonic tone and place it in the area you wish to leak test. Trace around potential problem areas with Whisper to alert you to the transmitter’s ultrasonic frequencies leaking through poorly-sealed areas.


  • Versatility for a variety of applications and industries
  • Works on any gas under pressure or vacuum
  • Measures any gas leaks in pressure or vacuum
  • Internal noise control to filter out noisy environments
  • Designed for one-hand operation.

Range of Applications:

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

Complete with: 

INF-711-203-G11 – INFICON Whisper Leak Detector, Hard plastic carry case, 2 x D-size alkaline batteries, Rubber probe extension, Headphones, Set of Operating Instructions and Full 24 Month Warranty Card.


  • Sensor Technology: Ultrasonic
  • Sensitivity: Detects leaks from 0.1 mm diameter orifice at 5 PSIG from a 30 cm distance
  • Leak Indicators: LED; audible alarm
  • Power Source: Two “D” alkaline batteries (Duracell Only)
  • Battery Life: 165 hours (laser pointer off): 115 hours (laser pointer on)
  • Probe Type: Rubber extension probe
  • Controls: Power (On/Off) Sensitivity (High/Low)
  • Working Temperature Range: -20 to 50oC
  • Storage Temperature Range: -20 to + 60oC
  • Dimensions: 32cm x 8cm x 17cm
  • Unit Weight: 482gm with batteries
  • Shipping Weight: 2 Kg
  • Certifications: CE Marking Power Safety and EMC
  • Country of Origin: USA by INFICON.

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