產品說明0
SHT21 Humidity and Temp Sensor ／SKU：MD0530
Description
The Humidity and Temperature Sensor is an Arduino-compatible sensor board that carries an SHT21 digital humidity and temperature sensor from Sensirion. It has a 4-pin interface that can communicate directly with the analog pins on the Arduino.／濕度和溫度傳感器是與 Arduino 兼容的傳感器板，帶有 Sensirion 的 SHT21 數字濕度和溫度傳感器。它有一個 4 引腳接口，可以直接與 Arduino 上的模擬引腳通信。
The SHT21 utilizes a capacitive sensor element to measure humidity, while the temperature is measured by a band gap sensor. Both sensors are seamlessly coupled to a 14-bit ADC, which then transmits digital data to the Arduino over the I2C protocol. Because of the sensor’s tiny size, it has incredibly low power consumption, making it suited for virtually any application.／SHT21 使用電容式傳感器元件來測量濕度，而溫度則由帶隙傳感器測量。兩個傳感器都無縫耦合到 14 位 ADC，然後通過 I2C 協議將數字數據傳輸到 Arduino。由於傳感器的尺寸很小，它具有令人難以置信的低功耗，使其幾乎適用於任何應用。
To optimize accuracy of temperature and humidity readings, the SHT21 sensor is placed at the tip of the board, isolating it from heat producing circuitry. Two of the sensor’s four pins are ground and +5V; the other two are clock and data pins that make up the 2-wire serial interface. The board is 5V tolerant and designed to operate directly off the supply voltage coming from the Arduino.／為了優化溫度和濕度讀數的準確性，SHT21 傳感器放置在電路板的尖端，將其與發熱電路隔離。傳感器的四個引腳中有兩個是接地和+5V；另外兩個是構成 2 線串行接口的時鐘和數據引腳。該板可承受 5V 電壓，旨在直接使用來自 Arduino 的電源電壓運行。
The sensor can be placed in soil to measure moisture and temperature, which makes it ideal for using it in a garden or greenhouse. The humidity sensor is also especially useful in building remote weather stations.／該傳感器可以放置在土壤中以測量水分和溫度，因此非常適合在花園或溫室中使用。濕度傳感器在建造遠程氣象站時也特別有用。
The board ships a with a 4-pin male header which has not been soldered on.／該板附帶一個未焊接的 4 針公頭。
Specifications
- Energy consumption: 80 uW (at 12 bit, 3V, 1 measurement/s)
- Relative Humidity operating range: 0-100% RH
- Relative Humidity resolution of 0.03%
- Relative Humidity Response Time of 8 sec (tau 63%)
- Temperature operating range: -40 to +125°C
- Temperature resolution of 0.01 C
- 4 pins: +5V, GND, Clock (SCL), Data (SDA)
- Bidirectional communication over a single pin on I2C protocol
- Board is 5V tolerant, allowing sensor to run from a 5V supply on Arduino I/O pins
- Dimensions: 2.1mm x 1mm
Applications
- Homes, basements and HVAC systems for measuring humidity
- People with physical conditions sensitive to humidity
- Home ventilating, heating and air conditioning systems
- Meteorology stations to predict or check weather temperatures
- Gardens or greenhouses to check humidity and temperatures
