Digital Ultrasonic Testing Device for Preventive Maintenance


Application field:
The SONOPHONE combines innovative sensors and software for preventive maintenance that can be operated intuitively and paves the way for new processes for new applications.

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  • Intuitive Web and App Concept
  • Optional modular PC software platform for Measurement point organization | Route planning Trend analysis | documentation
  • Bundle important information about the measuring point
  • Broadband ultrasound analysis
  • Low weight and small size


  • Leak detection on compressed air systems
  • Early warning of bearing failure and lubrications
  • Show multiple leaks in one image
  • Steam trap testing
  • Electrical inspection
  • Tightness testing

Technical Specifications


Design Digital Ultrasonic Testing Device with Touchscreen
Processor ARM Cortex-A9 Dual Core 1.2 GHz
Display 5″ TFT Display, Resolution WVGA 800 x 480 Pixel
Touchscreen PCT, 5-Point Multi-Touch Controller
Acoustic Signal Output Via Speaker or wired Headphones
Memory 8 GB Flash System Memory16 GB Flash Internal Measurement Data Memory 2 GB SDRAM
Connections and Interfaces

Ultrasonic Sensors: Lemo

Charger: USB 2.0 Micro-B

Stereo Headphone Jack: 3.5 mm

Memory for Data Export: Slot for microSD Card (up to 32 GB)

Operating System Android 4.4.2

5-Megapixel Camera on the Back of the Device

integrated Microphone

integrated Position Sensor

Dimensions (W x H x D) 90 x 174 x 25 mm (90 x 174 x 30 with High-Capacity Battery)
Weight 370 g (420 g incl. High-Capacity Battery)


Electrical Data

Battery Type: Lithium Polymer Battery; 3.7 V; 4.05 Ah; 15 Wh (High-Capacity Battery: 3.7 V; 7.35 Ah; 27.2 Wh)
Power Supply Charging Adapter with micro–USB Connection (5 V, 2 A)
Operating Time In practical Use: 8 … 12 h
In continuous Operation: 4 h (or 8 h with High-Capacity Battery)
Charging Time Typically, 4 h

Software LevelMeter App






Take Photos to attach to Data Sets or Measurements
Inserting Markers immediately after taking a Photo
Record Voice Memos for attaching to Data Sets or Measurements
Storage of Text Comments
Select the Current Application (Leak, Bearing etc.) for the Context for Measurements
Creation of PDF Reports of selected Records
Export of selected Data Records for further Analysis on the Computer (e.g., in the DataViewer)



Saving and Recording

Format Audio Data: *.wav
Storage Location: Internal Measurement Storage
Memory Requirements (per Minute of Measurement Time)
Level: 88 kB
Spectra: 2 MB
Audio: 1 MB
Data Organization: Hierarchical in Data Sets and Measurements




Level Graph (only the “Main” Level – highlighted in Green, freely selectable)
Level Wheel and Level Bars (instantaneous Level only)
Level Table, configurable in Terms of Layout, Number (max. 5) and Type of displayed Levels
The following Sound Pressure Levels can be displayed, as well as the Temperature (T, only active with Structure-Borne Sound Sensor BS20):
L – Instantaneous Level
LF – Instantaneous Level with Time Weighting
Lpk – Peak Level
Leq – Equivalent continuous Sound Level
Lmin – Minimum Value of instantaneous Level
Lmax – Maximum Value of instantaneous Level
(in dB, Reference p0 = 20 µPa, Temporal Resolution: 16 ms per Level Value)
Spectrogram (Temporal Resolution: 16 ms per Frequency Spectrum)
Measurement Time, Playback Position
Operating modes Live – Display of current measured Values
Recording – Display and saving of current measured Values
Playback – playing of saved measured Values
Languages Chinese, Czech, Dutch, English, French, German, Hungarian, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish, Turkish
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