Seeed Grove – Temperature & Humidity Sensor Pro 專業版電容數位溫濕度感測器 (DHT22 / AM2302)

商品說明

AM2302 濕敏模組 是一款含有己校準數位信號輸出的溫濕度複合感測器。它應用專用的數位模組採集技術和溫濕度傳感技術，確保產品具有極高的可靠性與卓越的長期穩定性。感測器 包括一個電容式感濕元件和一個高精度測溫元件，並與一個高性能 8 位單片機相連接。因此該產品具 有品質卓越、超快回應、抗干擾能力強、性價比極高等優點。每個感測器都在極為精確的濕度校驗室 中進行校準。校準係數以程式的形式儲存在單片機中，感測器內部在檢測信號的處理過程中要調用這 些校準係數。標準單匯流排界面，使系統集成變得簡易快捷。超小的體積、極低的功耗，信號傳輸距離 可達 20 米以上，使其成為各類應用甚至最為苛刻的應用場合的最佳選擇。產品為 3 引線（單匯流排界面） 連接方便。特殊封裝形式可根據使用者需求而提供。

用於檢測環境的溫濕度感測器，相對於溫濕度傳感器具有較高的準確度，檢測範圍為5% RH – 99%和RH-40°C – 80°C，精確度達到2% RH和0.5°C。

電容數位溫濕度感測器 特徵

• 高溫高濕測量精度
• 廣泛的溫度和濕度測量
• 超低功耗
• 20米信號傳輸距離
• 工廠校準，易於使用

 

電容數位溫濕度感測器 規格

VCC	3.3	–	6	V
支持測量電流	1	–	1.5	mA
待機電流	40	–	50	uA
測量範圍 (濕度)	5%	–	99%	RH
測量範圍 (溫度)	-40	–	80	°C
精度 (濕度)	–	–	±2%	RH
精度 (溫度)	–	–	±0.5	°C
分辨率 (濕度)	–	–	0.1%	RH
分辨率 (溫度)	–	–	0.1	°C
再现性 (濕度)	–	–	±0.3%	RH
再现性 (溫度)	–	–	±0.2	°C
長期穩定性	–	–	±0.5%	RH/year
信號采集周期	–	2	–	S
響應時間1 / e（63％）	6	–	20	S

 

硬件概述

出貨清單

• Grove – Temperature&Humidity Sensor Pro x1
• Grove連接線 x1

Documents

• Grove – Temperature & Humidity Sensor Pro (AM2302/DHT22) wiki
• AM2302 / DHT22數據表
• Grove – 溫度和濕度傳感器Pro（AM2302 / DHT22）鷹文件

 

電容數位溫濕度感測器 技術補充（英文）

以下為原廠英文技術說明，提供使用者參考。

This sensor is a high accuracy Temperature and Humidity sensor based on the DHT22 module (also known as AM2302 or RHT03). High cost performance and high precision make it ideal for temperature and humidity monitoring of Arduino and Raspberry Pi, you can also use it to make a thermometer and hygrometer.

The DHT22 includes a capacitive humidity sensor and a high precision temperature sensor. The range of humidity sensor is 0 to 99.9 %RH with ±2% accuracy while the temperature sensor ranges from -40 to 80℃ with ±0.5℃ accuracy. With the help of a built-in 8-bit microcontroller, the DHT22 converts the analog output of those two sensors to the digital signal, and output both temperature and humidity data via a single pin.

Compared with the DHT11, this product has higher precision and wider measurement range, but the usage and code are almost the same. Simply put, if you need higher measurement accuracy, this product will be a better choice; if you need a higher price/performance ratio, then Grove – Temperature & Humidity Sensor (DHT11) may be more appropriate. The figure below lists the main differences between the two:

All in all, DHT22 is an excellent low-cost temperature and humidity module, so we made this DHT22 breakout board with Grove connector. Now it even becomes more convenient to use. Just plug and play with your Seeeduino or Grove compatible shield.

Features

• High temperature and humidity measurement accuracy
• Wide range of temperature and humidity measurement
• Ultra low power consumption
• 20-meter signal transmission distance
• Factory calibrated, easy to use

Applications

• Environmental monitoring
• Thermometer and hygrometer
• Dehumidifier