Product Summary

The DHT22 is a Digital-output relative humidity & temperature sensor/module. It utilizes exclusive digital-signal-collecting-technique and humidity sensing technology, assuring its reliability and stability.Its sensing elements is connected with 8-bit single-chip computer.

Parametrics

Absolute maximum ratings: (1)Power supply: 3.3-6V DC; (2)Output signal: digital signal via single-bus; (3)Sensing element: Polymer capacitor; (4)Operating range: humidity 0-100%RH; temperature -40~80Celsius; (5)Accuracy: humidity +-2%RH(Max +-5%RH); temperature <+-0.5Celsius; (6)Resolution or sensitivity humidity: 0.1%RH; temperature 0.1Celsius; (7)Repeatability: humidity +-1%RH; temperature +-0.2Celsius; (8)Humidity hysteresis: +-0.3%RH; (9)Long-term Stability: +-0.5%RH/year; (10)Sensing period: Average: 2s.

Features

Features: (1)Full range temperature compensated; (2)Relative humidity and temperature measurement; (3)Calibrated digital signal; (4)Outstanding long-term stability; (5)Extra components not needed; (6)Long transmission distance; (7)Low power consumption; (8)4 pins packaged and fully interchangeable.

Diagrams