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粒子傳感器2.5PM和10PM - SDS021
原名
Particle Sensor 2.5PM and 10PM - SDS021
貨號
SPX-14309
特價
1,714
資料來源：https://www.sparkfun.com/products/14309
Measuring air quality includes the necessity to determine the amount of dust or particulate matter (PM) in the air. Dust is not so bad but really small particles, 2.5µm and 10µm in diameter, can penetrate the lungs causing all sorts of health problems. The measurement of these particles are often called 2.5PM and 10PM and they are measured in micro-grams per cubic meter of air (µg/m3).
The SDS021 sensor uses laser based light scattering to detect both 2.5µm and 10µm sized particles. It has an integrated fan to maintain constant airflow across the sensing chamber. The sensor does all the internal processing and temperature compensation and outputs both measurements over an easy to use serial interface every second.
A four pin interface cable is included with the sensor. One end of the cable is a 1.25mm pitch connector that connects to the sensor. The opposite end of the cable is four, breadboard-friendly, male pins that make it easy to connect to any platform.
Once power is applied the sensor will start reporting readings every second. Only three connections (5V, GND, RX) are required but if you want to send commands to the module you’ll need a fourth wire (TX). We’ve written a handful of example sketches to demonstrate how to read the 2.5PM and 10PM measurements as well as graph the output and sleeping/waking the module via software to conserve power.
The sensor requires 5V to operate so we recommend using this with a RedBoard, Teensy, or other platform that can provide a good 5V at 60mA. The serial interface is 3.3V so use a logic level converter where needed.
Walking and/or movement of the sensor will cause airflow variations across the sensing chamber but the variance is not estimated to have significant impact on the measurements.
We do not plan to regularly carry SparkX products so get them while they’re hot!
Experimental Product: SparkX products are rapidly located and produced to bring you the most cutting edge technology as it becomes available. These products are tested but come with no guarantees. Live technical support is not available for SparkX products. Head on over to our forum for support or to ask a question.
Features:
- Voltage: 5V
- Current: 60mA (laser/fan on), less than 4mA during sleep (laser/fan off)
- Precision: 0.0 to 999.9 µg/m3
- Accuracy: +/- 10µg/m3, +/-15% at upper threshold of 999µg/m3
- Outputs 2.5PM and 10PM readings every second
- Software controlled sleep and wake
Documents:
- SDA021 Datasheet
- Serial Interface Specification
- Example sketches to get your started
- Good Wikipedia article on particulates
測量空氣質量包括確定空氣中灰塵或顆粒物質（PM）的量的必要性。灰塵沒有那麼糟，但真正的小粒子，直徑為2.5μm和10μm，可以穿透肺部造成各種健康問題。這些顆粒的測量通常稱為2.5PM和10PM ，它們以微克每立方米空氣（μg/ m 3 ）測量。
SDS021傳感器使用基於激光的光散射來檢測2.5μm和10μm的顆粒。它具有一個集成的風扇，以保持傳感室的恆定氣流。傳感器執行所有的內部處理和溫度補償，並通過易於使用的串行接口每秒輸出兩次測量。
傳感器附帶四針接口電纜。電纜的一端是連接到傳感器的1.25mm間距連接器。相反的連接器是一個0.1“間距的極化連接器，我們發現插入公頭跳線最好工作（如照片所示），但也可以使用公頭 。
一旦施加電源，傳感器將每秒鐘開始報告讀數。只需要三個連接（5V，GND，RX），但如果要向模塊發送命令，則需要第四根線（TX）。我們已經寫了一些示例草圖來演示如何讀取2.5PM和10PM測量，以及通過軟件繪製輸出和睡眠/喚醒模塊以節省功耗。
傳感器需要5V操作，因此我們建議您使用RedBoard ， Teensy或其他能夠以60mA提供良好5V的平台。串行接口為3.3V，因此在需要時使用邏輯電平轉換器 。
傳感器的行走和/或移動將導致感測室之間的氣流變化，但是估計方差不會對測量產生重大影響。
我們不打算定期攜帶SparkX產品，讓他們在熱的時候！
特徵：
- 電壓：5V
- 電流：60mA（激光/風扇開啟），睡眠時小於4mA（激光/風扇關閉）
- 精度：0.0〜999.9μg/ m 3
- 精度：+/-10μg/ m 3 ，上限閾值為999μg/ m 3時為+/- 15％
- 每秒輸出2.5PM和10PM讀數
- 軟件控制睡眠和喚醒
文件：
