Aqara’s cord-free presence sensor runs for up to three years on battery power

The $50 sensor runs on two coin cell batteries so you don’t need a nearby power source for installation.
GitHub

Deneyap Temperature&Humidity, Barometer Sensor SHT4X Arduino Library

This Arduino library allows you to use Deneyap Temperature&Humidity, Barometer SHT4X with I2C peripheral. You can use this library in your projects with any Arduino compatible board with I2C ...
IEEE

Robust Skin Attachable Sensor for Core Body Temperature Monitoring

Abstract: We designed a skin-attachable sensor for measuring core body temperature (CBT). Past studies on non-invasive CBT measurement did not consider heat loss and measurement errors caused by ...
IEEE

High-Sensitivity Paper-Based Capacitive Humidity Sensors for Respiratory Monitoring

Abstract: Paper-based humidity sensors have attracted considerable research attention due to their low cost, flexibility, and biodegradability. The problem of current paper-based humidity sensors is ...