This humidity sensor consists of 2 copper conductors that are located at small distance from each other. The relay switches as soon as the moisture makes a connection that is more or less electrically ...

The Sensiron SHT45 precision temperature and humidity sensor got featured here a couple of years ago, and wonderful Adafruit has picked up on it, and not only produces SHT4x breakout boards (right), ...

Some sensors output a processed analog signal that is linear with respect to the physical quantity being measured. Some perform quantization as well and provide a digital output. Though it is easy to ...