Product Overview
DHT21 is a low-cost capacitive humidity & temperature sensor. It uses the same protocol as the DHT11.
Ultra-low power: 300uA Average, 15uA when sleep
Excellent long-term stability
All calibration, digital output
Completely interchangeable
Long distance signal transmission: up to 20m
Specifications:
- Power Supply: 3.3-5.2V DC
- Resolution: ±0.1
- Temperature measurement range: -40 ~ +80 ℃ @ ±0.5℃
- Humidity measurement range: 0-99.9%RH @ ±3%RH
