Scientists at the Eindhoven University of Technology have developed a tiny temperature sensor that it powered by radio waves.
The sensor uses radio waves that are part of their wireless network for power, this means it can be placed virtually anywhere and can run without the need for wires and an additional power source.
The tiny temperature sensor is designed to be used in buildings to provide details on temperatures around the building.
The smart buildings of the future will be full of sensors that will respond to the residents’ every need, and will be as sustainable as possible. Like heating and lighting that only switches on when someone is in the room. That’s only possible if these sensors are wireless and need no batteries, otherwise in a large building you would have to change the batteries every day. This is demonstrated by TU/e researcher Hao Gao who will be awarded his PhD on Monday 7 December for his thesis in which he developed a sensor that measures just 2 square millimeters and weights a mere 1.6 milligrams, equivalent to a grain of sand.
The sensor has a range of 2.5cm at the moment, although the researchers are expecting to extend this to around a meter within a year and then around 5 meters.
You can find out more details about what is probably the world’s smallest temperature sensor at the link below.