Aqara makes more smart sensors than almost anyone else, and I find them to be consistent and stable. Here are the presence ...

A novel chipless RFID humidity sensor based on a finite artificial impedance surface (AIS) is presented. The unit cell of the AIS is composed of three concentric loops thus obtaining three deep and ...

Accurate ammonia detection is critical for areas such as environmental monitoring, medical diagnostics, and industrial safety. Existing commercial gas sensors struggle with poor sensitivity, ...