Proximity sensor

A startup, incubated at the Indian Institute of Management Kozhikode (IIM-K), has developed a wearable hand band that helps in maintaining social distancing by sending an alarm in case of proximity with another person. Veli Band helps implement social distancing and location/contact tracing. The band momentarily vibrates, sounds buzzer, and flashes LED simultaneously to notify wearers that another band is within three feet (one metre), reminding them of the need to maintain social distance.

https://www.iimk.ac.in/