通常即時遠端監測系統之資料取得方式包括定時回傳及資料超過一定門檻值回傳兩種，即
時監測硬體設備包括監測之感測器及傳輸之相關設備，若傳輸設備之解析度較水質監測設備
低，設定低門檻值容易因水質有些微變化就造成回傳數值之劇烈變動；但若將回傳門檻值調大，
又會有資料不準確問題，因此若能提高傳輸設備之解析度，或可提高回傳精度。本研究利用無
線感測網路進行水質監測之傳輸，並應用擴充面板(MDA300)以提高精確度。經試驗結果顯示，
加上MDA300 之設備，其誤差值之標準偏差為原有設備之半，誤差明顯減少，未來可應用於實
際監測之用。

Generally speaking, the data gathering types of real-time remote monitoring system (RTRMS) include fixed time values and threshold values. The equipments of real-time monitoring system for water quality include sensors and data transmitting gears. If the data transmitting gears have less precision then sensors, a low threshold value may induce a great value changes for small fluctuation indeed. However, a high threshold value may got a low precision values. Therefore, the solution is to
raise the precision of the data transmitting gear. This study adopted wireless sensor network to establish a RTRMS for water quality, and then add a expand board (MDA300) to improve the precision of transmitting equipment. The experimental results showed that the standard deviation can drop in half. i.e. The error decrease dramatically. This study can be applied to the practical applications in the future.