What does a flashing or colored status LED on a SONAPHONE sensor indicate?

The status LED indicates the current operating state of the connected SONAPHONE sensor.

Its meaning differs depending on the sensor type.

BS10, BS20, and BS30

For these sensors:

• Status LED continuously illuminated: sensor is active
• Status LED flashing: sensor is in boot mode

Boot mode is required for updating the sensor firmware.

During normal measurement operation, the status LED should remain continuously illuminated after the sensor has been connected.

BS40

The BS40 uses different LED colors to indicate its operating state:

• Green: sensor is active
• Red: sensor is in boot mode
• Orange: sensor is in service mode

Boot mode is also used for firmware updates on the BS40.

What can I do if the sensor unexpectedly remains in boot mode?

If the sensor is in boot mode even though no firmware update is being performed and it is not correctly detected by the SONAPHONE, the following basic steps can be tried:

1. Disconnect the sensor from the SONAPHONE.
2. Reconnect the sensor correctly.
3. Check that all connectors are fully inserted and that the red markings on the cable and sockets are aligned.
4. If the sensor is still not detected correctly, switch the SONAPHONE off and on again.

This restarts sensor detection on the SONAPHONE.

If the sensor continues to remain in boot mode or is still not detected, contact SONOTEC Support.

How is the sensor firmware updated?

Firmware updates for the BS10, BS20, BS30, and BS40 sensors are performed using the Hardware Manager app installed on the SONAPHONE.

During a firmware update, the sensor may be in boot mode. The corresponding LED indication is normal in this case.