AM2305 Digital Temperature and Humidity Sensor

Most hobbyist temperature/humidity sensors assume the sensor sits right next to the microcontroller - the AM2305 is built for the opposite scenario, where the sensing point needs to be meters away from the electronics reading it, such as inside a greenhouse, silo, or outdoor enclosure while the controller stays in a protected location indoors. Its metal-screened probe housing protects the sensing element from dust and physical damage in a way a bare PCB-mounted sensor can't, and it's rated for reliable digital signal transmission over runs of 20 meters or more.

Accuracy of ±0.3°C and ±3% relative humidity across a -40°C to 80°C range covers genuinely demanding environmental extremes, not just comfortable indoor conditions, and the single-wire digital interface keeps wiring simple even at that cable length. Fast response time and good anti-interference performance matter specifically because of the longer cable runs this sensor is designed for, where a noisier or slower sensor would struggle.

Common uses are greenhouse and agricultural environmental monitoring where the sensor needs to be remote from the control electronics, industrial temperature/humidity logging in harsh environments, and outdoor weather station builds needing a genuinely durable, long-cable-run sensor rather than an indoor-only breakout.