ATEX Certificated for the Use in Areas with Risk of Explosion


  • For use in potentially explosive atmospheres
  • Integrated data logger
  • Multifunctional testing device
  • Easy handling

Fields of Application:

  • Leak Detection on Compressed Air Systems
  • Early warning of Bearing Failure & Lubrication
  • Valve and Steam Trap Inspection

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The SONAPHONE E is designed for the rapid, reliable and cost-effective detection of seal failures and the smallest of leaks within compressed air systems and networks, vacuum systems, industrial equipment and machinery and covered pipes with restricted access. The ultrasonic detection device enables the early detection and avoidance of potential damages and resulting cost savings.

The regular inspection of engines, pumps and gearing using the SONAPHONE E leads to increased operational reliability and guarantees a higher degree of availability of machinery. By means of the flow noise the inspection of the leak tightness of valves, slide valves and steam traps is possible. The option of an additional ultrasonic transmitter allows the control of the leak tightness of windows, doors, cabins and devices with little additional expense.

Defect induced noises and wear to various machinery components and rotating machinery can be recorded electronically. In addition to all individual and serial testing procedures, all irregularities can be transferred to a PC online and presented and archived in graphic and tabular format.

An efficient integrated data logger enables the rapid transfer of data between the device and your computer via a USB interface.

The addition of an optional temperature sensor allows the measurement and simultaneous recording of surface temperatures of up to 800 °C. The SONAPHONE E has a user-friendly display and PC software with logical menu navigation.

Due to its intrinsically safe construction design, the SONAPHONE E is also suitable for use in areas with risk of explosion.


Technical Data

Transmission frequency

20-60 kHz


190 x 110 x 85 mm


Ultrasonic sensor
Temperature sensor
USB interface (USB 2.0)


Graphical display with Background lighting

Temperature Measurement Range

0 ... 800 °C


Approx. 600 g


5 Batterien R6 für ca. 8 Betriebsstunden

Additional Functions

Internal data storage of 20 000 test values,
Menu control, Built-in speaker


Shock resistant plastic with wipe-clean membrane

Explosion Protection
Ex ia IIC T4 Gb or
Ex ia IIB T4 Ga


Air-borne probe L 60

Applications: leak detection, proof of seal failure6

Acoustical horn for long distances

Attachment for airborne probe L60
Applications: leak detection and detection of partial discharges over long distances

Contact Probe L 61

Applications: inspection of valves, slide and safety valves

Contact Probe L62

Applications: testing of steam traps

Flexible air-borne sound probe L 63

Applications: leak detection at places, difficult to access

Customer References

Arnim Müller, Shift Leader at Bayer Pharma AG in Bergkamen, on our SONAPHONE E and our training:

"The main reason for acquiring a SONAPHONE E was the possibility of finding leaks in vacuum systems. Following the training “Preventive maintenance with ultrasonic testing devices" at SONOTEC I am really convinced that the SONAPHONE E can also be used for quick checking of steam traps. This also applies for tightness testing on tanks pre-commissioning."

Pascal Schulte, responsible for mechanical maintenance at Fortum Service Deutschland GmbH, on our SONAPHONE E:

 “There are many devices that check only steam traps. The SONAPHONE can be used for various applications and assists us greatly during the daily maintenance work. Another advantage is that inspections can be performed incredibly fast. Now we can reliably test a valve within a minimum of time. From us the SONAPHONE gets only top grades.”