A kind of arrangement for detecting (two) of drop liquid measure a, comprising: fixing element, a photo-coupler and a telecommunication transmission unit. The arrangement for detecting is configured on what dropping bottle,And the control system electrical connection with outside,To provide photo-coupler operating voltage Hou,Generate the light emitting unit of the photo-coupler in the low bottle of light source directive point,And the corresponding light receiving unit reception number of the what dropping bottle other end,It reaches to the light decay rate of external control system operation luminous intensity,When operation Hou judges that the light decay rate of luminous intensity reaches setting value,Indicate there is liquid in dropping bottle,If light decay rate does not reach setting value,Indicate that the flat interior no liquid of drop or liquid will drip to the greatest extent,The control system generates the sound or light,To notify medical care person or caregiver,Carry out drop removal or replacement.一種點滴液量的偵測裝置(二)，包括：一固定元件、一光耦合器及一電訊傳輸單元。將該偵測裝置配置於點滴瓶上，並與外部的控制系統電性連結，以提供光耦合器工作電壓後，使該光耦合器的光發射單元產生光源射向點低瓶內，並於點滴瓶另一端對應的光接收單元接收號，傳至給外部的控制系統運算光強度的光衰減率，在運算後判斷光強度的光衰減率達到設定值時，表示點滴瓶內有液體，若是光衰減率未達設定值，表示點滴平內已無液體或液體將滴盡，該控制系統產生聲響或光，以通知醫護者或看護者，進行點滴移除或更換。
