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The DHT21 digital temperature sensor is one of the commonest from the range of DHT temperature sensors and boasts a relatively high temperature measurement accuracy of 0.5oC in 0.1oC steps with a relative humidity accuracy of +/- 3%. It has only 3 wires, including power and ground, meaning only one digital pin is required to interface it to a microcontroller.
Specifications:
Power supply: 3.3-5V DC
Output signal: digital signal via single-bus
Wiring: Red-VCC, Yellow-SDA, Black-GND
Sensing element: Polymer humidity capacitor
Measuring range: humidity 0-100%RH; temperature -40~80Celsius
Accuracy: humidity +-3%RH(Max +-5%RH); temperature <+-1Celsius
Resolution or sensitivity: humidity 0.1%RH; temperature 0.1Celsius
Repeatability: humidity +-1%RH; temperature +-0.2Celsius
This website uses cookies, which are necessary for the technical operation of the website and are always set. Other cookies, which increase the usability of this website, serve for direct advertising or simplify interaction with other websites and social networks, will only be used with your consent. More information
