Applied Photophysics Ltd （ 應用光物理公司）生產的型號為 SX20 的停流光譜儀，在國內的清華大學、武漢大學、中山大學、華南農業大學應用多年， 并有很好的高等級的文獻引用和發表，數據引用率占可檢索到的已發表的文獻的百分之八十以上。

停流光譜儀相關說明：

停流（stopped flow）是一種光譜技術，用于研究溶液體系的非常快速的反應的機理，反應的時間一般在0.001秒到0.01秒之間，這個瞬時動力學現象可反映反應的速度、機理、短時間存在過的反應中間體等基礎信息。

可選擇配置的功能模塊為：時間分辨的吸收分析、管陣列檢測器、雙熒光檢測、熒光偏振檢測，多通道序列混合系統、淬滅停流檢測，及CD圓色停流stopped flow分析系統等。

The SX20 is the latest in the SX range of stopped-flow reaction analysers from Applied Photophysics and is used to study transient and pre-steady-state kinetics of fast, liquid-phase reactions. The SX range has, since its introduction over 15 years ago, established itself as the first choice of those involved in stopped-flow kinetic research. The SX20 and its predecessors offer unrivalled performance, as well as a host of upgrade opportunities for the detailed investigation of chemical and biochemical reaction mechanisms.