In 2020, Terabee SAS, a start-up supported by the French BIC Innogex, developed the proximity-sensing device Proximeter, based on CERN’s miniIoT (Internet of Things) technology. The portable, wearable device can be used to register encounters (as defined by the contact-tracing authority), improve contact tracing in the event of a positive coronavirus test result, or to alert the wearer when in close proximity to others beyond a certain time. The device will deliver fast and timely data thanks to the robust communication module and back-end software made available by CERN, respecting user’s privacy.