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Digital Ultrasonic Testing Device for Preventive Maintenance

In the age of Industry 4.0 the optimizing processes, increasing operational safety, and improving energy efficiency are becoming more and more significant. Meet the challenges of Maintenance 4.0 with the new SONAPHONE from SONOTEC. The digital ultrasonic testing device combines innovative sensors and software for preventive maintenance that can be operated intuitively and paves the way for new processes for new applications.


The Digital Ultrasonic Testing Device combines novel sensors and software that can be operated intuitively for preventive maintenance. Innovative airborne and structure-borne sound sensors that can be connected to the multi-function testing device with just one simple motion, pave the way for new domains of use. The mobile handheld device is operated via touchscreen and is the ideal companion throughout the entire test procedure. Besides test values and spectrograms, it is also possible to store photographs, voice memos and comments relating to the measuring points. With only a few clicks you receive a test report and can prove management your contribution to energy efficiency and process optimization.


With the new SONAPHONE you can

  • Detect and classify leaks in compressed air, gas and vacuum systems and reduce your energy costs
  • Monitor the condition of your machines and determine the optimal maintenance time
  • Identify leaks in windows, doors, vehicles, components and containers and ensure compliance with specified quality requirements
  • Find electrical partial discharges and insulation damage and increase your operational safety
  • Assess the function of steam traps and prevent energy and steam loss and damage to the steam system

Broadband ultrasonic analysis

  • Frequency range from 20 to 100 kHz

Software that is intuitive to operate

  • Apps accompany you through the entire testing process; from planning, testing and documentation to analysis
  • SONAPHONE can be operated intuitively like a tablet via 5-inch display with multi-touchscreen
  • Reduce Paper records, which are error-prone and above all time-consuming

Bundling relevant information

  • Apps bundle all information relevant to maintenance – always have an overview of the condition of your machines and systems
  • Record spectrograms, time signals, sound files and levels
  • Add photos, text comments and voice memos

Test reports with a few clicks

  • Create a professional report as a PDF and save time
  • Evaluate test data on the PC with SONAPHONE DataSuite

Electrical Inspection

Regular ultrasonic checks of electrical assets detect early partial discharges, ensuring plant reliability. Our SONAPHONE and SONASCREEN tools differentiate corona, tracking, and arcing stages across voltages, inspecting open/closed systems, cabinets, relays, and transformers for safety.

Ultrasonic Leak Detection

Detecting compressed air system leaks is vital for energy efficiency in manufacturing. Using our SONAPHONE and SONASCREEN devices for regular checks not only saves costs but also boosts safety and reliability by preventing leaks and conserving energy.

Steam Trap Testing

Ultrasound technology enables early detection of steam trap failures, preventing energy wastage, production downtime, and equipment damage. By identifying issues such as blockages or leaks, ultrasound assessments ensure optimal steam system efficiency. Regular checks using ultrasound tools like the SONAPHONE can enhance energy savings, reduce maintenance costs, and improve overall process reliability in industrial settings.

Condition Monitoring

Instituting routine condition-based monitoring of bearings is vital for an effective preventive maintenance strategy. Timely identification of damage or wear indicators in both friction and non-friction bearings mitigates downtime, bolsters operational dependability, and generates significant cost efficiencies.

SONAPHONE - Application videos



Broadband Airborne Sound Sensor for Leak Detection and Electrical Inspection


Broadband Structure-Borne Sound and Temperature Sensor


Broadband Parabolic Sensor for Leak Detection and Electrical Inspection up to 35 Meters


Broadband Structure-Borne Sound Sensor for Condition Monitoring

DataSuite Software

Software intented to manage Maintenance Tasks concerned with Routing | Trending | Alarm Levels | Reporting