Smartphone with KSB Sonolyzer® app

KSB Sonolyzer®

KSB Sonolyzer® – the app that hears whether energy can be saved

With this app, KSB brings Industry 4.0 straight to your smartphone: In just a few seconds, the KSB Sonolyzer® can measure the noise frequency of an asynchronous motor and check whether there are potential energy savings to be made, thus enabling an increase in pump efficiency.

Download the KSB Sonolyzer® app now

The free energy efficiency check for your rotating equipment

You can download the KSB Sonolyzer app free of charge for your smartphone or tablet. The app is available for Android and Apple devices.

Download here:

Discover the optimisation potential of your system with the KSB Sonolyzer® app.

In order to find out if there is energy saving potential, the app uses an estimation algorithm that was developed by KSB and is the first of its kind on the market. It can be used not only on KSB pumps but also on rotating equipment produced by many other manufacturers.

Smartphone with KSB Sonolyzer® app held to an asynchronous motor

Discover KSB Sonolyzer®!

Smartphone with KSB Sonolyzer® app

Step 1

Download KSB Sonolyzer® free of charge.

Smartphone with KSB Sonolyzer® app

Step 2

Select your pump type.

Smartphone with KSB Sonolyzer® app

Step 3

Enter your pump and motor data.

Smartphone with KSB Sonolyzer® app

Step 4

Start the measurement and hold your smartphone next to the motor. The KSB app delivers the analysis results in just 20 seconds.

Smartphone with KSB Sonolyzer® app

Step 5

The result of the measurement shows whether the operating point is inside or outside the part-load range.

Take advantage of potential energy savings

With the KSB Sonolyzer® app, you can contact your local KSB specialist directly by e-mail or phone to obtain a detailed efficiency analysis with KSB’s SES System Efficiency Service analysis tool. The app determines your location and puts you in direct contact with the relevant specialist.

The data package provided by the KSB app is an ideal starting point for obtaining a quick, detailed FluidFuture® analysis and for using the resulting potential savings identified to increase the efficiency of your pumps.

More about FluidFuture® from KSB…

SES System Efficiency Service® analysis tool connected to a pump

Frequently Asked Questions on KSB Sonolyzer®

1. My measurement has failed despite having repeated the process several times. What can I do?

  • Was the measurement taken on a variable speed machine? KSB Sonolyzer® can only take measurements on machines without frequency inverters.
  • KSB Sonolyzer® provides the best results when you hold the microphone of your mobile device as close to the motor fan as possible.
  • KSB Sonolyzer® requires the exact rated speed of the motor (on the motor name plate), not the speed of the pump (on the pump name plate).
  • Was the measurement taken on a motor whose drive rating is too high? KSB Sonolyzer® is only compatible with machines that have a drive rating of up to 200 kW.

A failed measurement generally means that KSB Sonolyzer® could not produce a reliable measurement result. To avoid incorrect information from being communicated in this scenario, an error message is displayed instead of a measurement result. Failed measurements can also have other causes:

  • Excessive wear of the pump set such as bearing damage or damage caused by cavitation can prevent KSB Sonolyzer® from reaching an accurate measurement result.
  • KSB Sonolyzer® is only compatible with fan-cooled motors.
  • Mains fluctuations can have a negative impact on the quality of the analysis.
  • The measurement period must be at least 20 seconds. If you turn the smartphone around in order to look at the display while the measurement is underway, the measurement will be interrupted.

2. How exactly does KSB Sonolyzer® work?

  • KSB Sonolyzer® starts out by analysing the audio signal of the motor fan to determine the current rotational speed of the asynchronous motor. This parameter is correlated with a suitable motor data model to derive the current input power of the machine. KSB Sonolyzer® then uses matching pump characteristic curves to determine the load range of the pump set.

3. How reliable and accurate is the KSB Sonolyzer® analysis?

  • Thousands of successful measurements prove the excellent capabilities of KSB Sonolyzer® in day-to-day activities. KSB Sonolyzer® provides an indication of the operating point for machines that have an asynchronous motor and helps identify potential savings in energy consumed by machines. Whether these can be realised and how exactly this can be achieved, however, depends on a number of factors that must be quantified for the specific application – a task that goes beyond the scope of KSB Sonolyzer®. To obtain qualified, binding results, an on-site analysis will need to be conducted by an expert. Please contact your KSB sales partner by sending a message directly from within the app.
  • See also

4. Can interfering noise compromise the measurement taken by KSB Sonolyzer®?

  • KSB Sonolyzer® is well equipped for filtering out the interfering noise typically generated by neighbouring machinery, for example. The most important thing to remember in this context is that you hold the microphone of the mobile device as close to the motor fan of the machine train you want to measure as possible. Doing so will ensure a satisfactory signal-to-noise ratio so that a correct measurement can be taken.

5. Can KSB Sonolyzer® also be used for machines from other manufacturers?

  • Yes, KSB Sonolyzer® is suitable for analysing many other manufacturers’ pumps driven by an asynchronous motor at a constant mains frequency. A selection of compatible machines can be found in the corresponding list of the app under the Audio Analysis menu item.

6. My pump is not included in the app’s selection list. Can I still use the KSB Sonolyzer®?

  • If your pump is comparable to a machine that is included in the selection list, particularly with respect to its power curve, KSB Sonolyzer®  will in all likelihood provide a correct measurement result.

7. What does the app cost?

  • KSB Sonolyzer® can be downloaded from the Google Play Store or the Apple App Store and used free of charge.

8. I have some ideas on how KSB Sonolyzer® can be improved. What can I do?

  • We welcome any feedback you have to offer. Please submit your ideas in an e-mail addressed to We will make every attempt to implement your improvements in future versions.
Identification of energy-saving potential (Sonolyzer)

Identification of Energy-Saving Potential

KSB Sonolyzer® is a smartphone app from KSB which analyses the motor sound of your asynchronous motor to identify whether your pump is operating efficiently or whether too much energy is being consumed.

  • Free download
  • Analysis within seconds
Energy efficiency consulting (Fluid Future) for pumps and valves

Energy Efficiency Consulting

Optimise your system’s energy efficiency in four steps using FluidFuture®. KSB’s systematic approach ensures maximum energy savings.

  • Systematic analysis
  • Clear recommendations for action
SES System Efficiency Service

SES System Efficiency Service

Pumps that are not optimally matched to the system consume too much energy. Thanks to SES System Efficiency Service from KSB, this doesn’t have to be the case.

  • Energy efficiency analysis
  • Damage analysis
Pump repair

Pump Repair

KSB offers professional and fast service for pumps of any make and, if required, can modernise them to the latest technological standards. KSB also provides this service for explosion-proof pump sets.

  • For all makes
  • Pump set service
Motor repair

Motor Repair

KSB offers comprehensive service solutions – not only for your pump but also for your motor. This helps you save time and money.

  • Pump set service from a single source
  • Less time and lower costs

Operation Tools

The latest software for your pumps and automation solutions alongside apps for optimising your system: KSB’s operation tools provide support in your day-to-day work.


As a leading supplier of pumps, valves and services, KSB boasts comprehensive expertise. This generates valuable know-how that KSB is happy to share with you.