Digital 2-in-1 Ambient Humidity & Temperature Sensor

Alternative names

DHT 21

Typical applications

Relative Air Humidity Monitoring
Basement Air Humidity Monitoring
Bathroom Air Humidity Monitoring

Monitoring of the ambient temperature
Monitoring of the room temperature

Weather Stations
HVAC (Heating, Ventilation and Air Conditioning) Systems

All this is possible with our App for Android and iOS without any programming including rules and automatic notifications on the smartphone.

Technical data

Power supply: 3V (min) – 5V (typical) – 5.5V (max)
Supported Bus Voltage Levels: 3-5V
Max current during conversion: 2.5mA
Max current during standby: 60µA

Humidity measuring range 0 to 100% with ± 2% accuracy
Temperature measuring range -40 to +80°C with ± 0.5°C accuracy
Max. sampling rate: 0.5Hz (once every 2 seconds)

Body size 58.5mm x 26.7mm x 13.8mm
3 wires