分辨力是傳感器和測量儀器的重要技術參數。數字儀器的分辨力通常取決于內部模數轉換器的位數，但如何確定由儀器和傳感器組成的檢測系統的分辨力，目前尚未見到與之相關的專門性研究成果。該文論證了檢測系統的分辨力只與隨機誤差相關，要提高分辨力就必須減小測量結果的隨機波動。通過實驗提出了檢測系統分辨力的定量計算公式，并證明了其置信概率大于90.9%。

Resolution is one of the key specifications for instruments. Generally, the resolution of digitized instruments dependent on their internal Analog to Digital Converter (ADC); but few related studies are published concern with the resolution of measurement system composed of instrument and sensors. Firstly it’s argued that resolution is only related to random errors; in order to improve resolution, the random fluctuations of measured results have to be decreased. Provided with mass experimental data, a formula for quantified calculating the resolution of measurement system is then presented, and 2.35σ is recommended to be an appreciated acceptable resolution. Lastly, more than 90.9% of confidence probability is proved to be achieved by using the formula.