A "sensing device" is a tool or instrument that can detect and measure things in the environment, such as temperature, light, motion, or sound. It helps gather information and signals to understand what is happening around us. Full definition
Each tip would be identified by a separate sensing device in the body of the stylus. (technowize.com)
Study participants were equipped with remote sensing devices to collect behavioral and environmental data including activity, communication, mobility, sleep - wake times, dietary intake, and light exposure. (sciencedaily.com)
It would sense devices placed it on and move into position to charge them. (theverge.com)