Compact Ultrasonic Testing Device for Preventive Maintenance


  •     Find leaks and save energy
  •     Early warning of bearing failure
  •     Compact design
  •     Easy to use
  •     Extensive accessories for a wide range of applications

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    Numerous preventive maintenance tasks can be handled quickly and efficiently with the SONAPHONE Pocket. Lower your energy costs and increase your operational safety with the most compact testing device of the SONAPHONE series. The ultrasonic testing device is used for

    •    leak detection  with compressed air, gas and vacuum systems,
    •    wear control on rotating machines,
    •    providing evidence of partial electrical discharges  where there is insulation damage,
    •    functional testing of steam traps and valves  and
    •    tightness testing  of unpressurised systems.

    With theSONAPHONE Pocket you identify problems even before they arise and create value at all levels of your company. Just by detecting and eliminating leaks you can reduce the energy costs for your compressed air system up to 30 percent. This also has positive effects on your operational safety and system productivity through early warning of bearing failure and evidence of partial electrical discharges.

    The compact testing device is designed to fit in any pocket. However, its robust construction means it is also appropriate for harsh industrial environments.

    The SONAPHONE Pocket is supplemented by extensive accessories in the form of airborne and structure-borne sound probes. You will receive the appropriate probe for your application from our product range, which you can attach to the device with just one simple movement.

    You do not need much time or expensive training in order to perform the test procedure. The testing device makes the ultrasonic signals audible and shows them on a digital display at the same time. The SONAPHONE Pocket – easy to handle and very effective.


    Technical Data

    Transmission frequency

    40 kHz, bandwidth +/- 2 kHz


    Detection of ultrasonic signals:Makes the ultrasonic signals audible and shows them on a digital display;


    LC-Display with illuminated background


    For different ultrasonic probes
    Stereo jack socket

    Power supply

    2 AA batteries or accumulators

    Operating time

    Approx. 24 h


    WHD 85 x 130 x 30 mm


    Approx. 280 g

    Operating temperature

    -10 °C … +60°C

    Storage temperature

    -20 °C … +60°C

    Protection class

    Device: IP54; Probe: IP20

    AccessoriesProbes, headphones, carrying strap, carrying case, instruction manual


    Application Set Leak Detection for Difficult to Access Areas

    for SONAPHONE Pocket
    incl. flexible airborne sound probe

    Air-borne probe L 50

    for SONAPHONE Pocket
    Applications: leak detection, proof of seal failures

    Contact Probe L 51

    for SONAPHONE Pocket
    Applications: inspection of valves, slide and safety valves

    Contact Probe L 52

    for SONAPHONE Pocket
    Applications: testing of steam traps, inspection of rotating machines

    Flexible air-borne sound probe L 53

    for SONAPHONE Pocket
    Applications: leak detection at places, difficult to access

    Parabolic Dish SONOSPOT

    for SONAPHONE Pocket
    Applications: precise detection of leaks or partial discharges over long distances

    Spherical Transmitter SONOSPHERE for SONAPHONE T

    Accessories: stand, magnetic and suction holder
    Applications: leak testing of cabins and containers (in combination with SONAPHONE T and SONAPHONE Pocket)


    Adjustable Ultrasonic Transmitter for the Reliable Detection of Leaks

    360° view

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