The World's Smallest Thermal Sensor That Does Not Require Charging

Researchers at Eindhoven University of Technology in the Netherlands have developed the world's smallest thermal sensor. The notable aspect of this sensor is that it can be charged using radio waves from a wireless network it connects to, eliminating the need for batteries. This is considered a significant achievement in electronics. The sensor is as light as a grain of sand and measures only two square millimeters. Dr. Hao Gao, the project manager of PREMISS at Eindhoven University, states that this sensor could play a crucial role in the future of consumer electronics. According to the BGR website, this sensor does not require a physical connection to a power source and is charged via radio waves from wireless networks, communicating through the same waves. "This sensor has an antenna that receives and stores energy from a source. When enough energy is accumulated, it turns on, measures temperature, and sends a signal. This signal has a specific frequency based on the measured temperature, which is how the temperature is determined." However, this sensor is not yet fully ready for market entry, as PREMISS can currently only transmit data up to about 2.5 centimeters. Gao mentions that improving the system's performance for longer distances is not out of reach. He believes that within a year, this distance can be increased to over one meter, and ultimately, the sensor will be able to transmit data over five meters. Perhaps the most important point is that researchers believe this technology can also be applied in motion, light, humidity sensors, and others. Professor Peter Baltus from Eindhoven University states that this technology can be used to create a network of sensors that do not require batteries and can be installed on the walls of a building. According to a report from Eindhoven University, these smart buildings, covered with sensors, will respond to various needs of residents and have a long lifespan. For example, the temperature will only rise or the lights will turn on when someone is in the room. This is possible when the system operates wirelessly and without the need for batteries; otherwise, in large buildings, batteries would need to be replaced daily. This sensor can also operate beneath layers of paint, plaster, and cement. The applications of this type of sensor are vast, ranging from payment and identification systems to industrial production systems; moreover, this technology will be cost-effective. With mass production of these sensors, their price will drop to about 20 cents.