From what distance can audible and ultrasonic sound sources be detected using the SONASCREEN 2?

The SONASCREEN 2 has a specified detection range of up to 150 m (492 ft).

This value represents the maximum technical detection range of the system. It does not mean that every sound source, leak, or partial discharge can be reliably detected from a distance of 150 m.

Does the 150 m range apply to every application?

No. The specification “up to 150 m” is a maximum range and not a guaranteed detection distance for a specific leak or partial discharge.

The SONASCREEN 2 operating manual describes the possibility of detecting or analyzing sound sources from greater distances for both:

• compressed-air leaks, and
• electrical partial discharges.

However, no fixed maximum distance is specified for a particular leak size or type of partial discharge.

Why can the actual detection distance vary?

A sound source can only be detected from a large distance if its acoustic signal can still be sufficiently captured and distinguished from other signals at the position of the camera.

The specified detection range of up to 150 m should therefore be understood as a maximum technical detection range under suitable conditions.

The product documentation does not define universal test conditions under which a specific leak or partial discharge is guaranteed to be detected at a distance of 150 m.

Why does the measurement distance have to be set?

The distance to the measurement object can be entered in the SONASCREEN 2 software.

The measurement distance is taken into account when calculating and displaying the acoustic image. Particularly when inspecting objects from greater distances, the distance to the test object should therefore be set as accurately as possible.

In Compressed Air Leakage mode, the distance is also relevant for quantitative leakage assessment.

What is the advantage of the long detection range?

The ability to detect ultrasonic sources from greater distances is particularly useful for:

• difficult-to-access system components,
• large installations,
• compressed-air installations at greater heights,
• electrical systems where safety distances must be maintained.

For electrical inspections in particular, non-contact acoustic localization makes it possible to investigate potential partial discharges from a safe distance.

The required safety distances and safety regulations applicable to the respective system must always be observed regardless of the technical detection range of the SONASCREEN 2.