Frequently Asked Question

Most of the time a question is already answered. Check out the Frequently Asked Questions page to see if you have that question.

For who?

The SENS-U monitors the filling of the bladder and gives a notification when the bladder is nearly full via a vibration in the SENS-U and/or a message on a smartphone. The user is notified that the bladder is full and action should be taken. The SENS-U Bladder Sensor helps to prevent unwanted urinary loss. 

The SENS-U KIDS is intended for schoolchildren who are under the treatment of a medical professional. It teaches children who are late with toilet training to go to the toilet when their bladder is full.

How does it work

The SENS-U is a non-invasive wearable sensor that uses ultrasound to detect how full the bladder is. The SENS-U bladder sensor is placed on the lower abdomen using a double-sided adhesive plaster. Ultrasound gel and a plaster are applied between the sensor and the skin to guarantee ultrasound conductivity and ensure it remains in the correct position. The measurement details are processed in the SENS-U, and the data is sent to a smartphone via Bluetooth.

The SENS-U is a non-invasive wearable sensor using ultrasound technology to measure bladder filling. The SENS-U Bladder Sensor is placed on the lower abdomen with an adhesive patch. Between the sensor and the skin, ultrasound gel and an adhesive patch are used to ensure ultrasound conduction and fixation. The sensor data is pre-processed in the scanner, and data is sent to a smartphone using Bluetooth.

How do I get SENS-U?

Urologists and pediatricians are using the SENS-U bladder sensor in numerous Dutch hospitals. We’ll be happy to inform you about the entire process from GP to hospital, and are of course always here to answer any other questions you may have. Send us a message and we’ll aim to reply within 24 hours.

The SENS-U® bladder sensor is medically CE-certified and available for care providers in Europe. They can purchase the SENS-U directly from Novioscan or a local dealer, and use with their patients right away. Contact us for more information.

During Use

The SENS-U starter kit contains everything you need to start using the sensor right away: adhesive plasters, ultrasound gel, alcohol swabs, and the SENS-U itself. Download the SENS-U app on your smartphone from the Google Play Store or App Store. Follow the instructions to set your preferences.

The SENS-U and smartphone are connected to each other wirelessly via Bluetooth Low Energy, so the device also works without WiFi

The SENS-U can connect to one smartphone at a time. It is possible, however, to also forward the full bladder notification to a second smartphone. You can find this option in the app menu under the bell icon.


The SENS-U bladder sensor is certified as a class IIA medical device, and has had CE mark since March 2018.

Novioscan has been ISO 13485 certified since March 2018.

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Clinical proof

The SENS-U Bladder Sensor is clinical validated in collaboration with the University Medical Center Utrecht, the Netherlands. The results of the validation studies are published in the Journal of Pediatric Urology. An overview of the latest scientific literature can be found via this link.

There are several SENS-U related clinical investigations ongoing, please contact us for the latest update or if you are interested in performing clinical research with the SENS-U.