PROBLEM TO BE SOLVED: To provide a liquid level detecting device for medical liquid that can accomplish high-precision detection of medical liquid even when the liquid is inclined only slightly and keep track of minute variations and the like of the liquid level.SOLUTION: A liquid level detecting device is intended for detecting level variation of medical liquid 3 stored in a storage bag 1 and makes known the replacement timing of the storage bag 1 according to the detected level variation of the medical liquid 3. The device is equipped with an electrostatic capacitance sensor 10 that detects variation of the electrostatic capacitance accompanying variation of the medical liquid 3 stored in the storage bag 1, a detecting unit 20 that detects liquid level variation of the medical liquid 3 from the variation of electrostatic capacitance detected by the electrostatic capacitance sensor 10 and generates and transmits handling information signals using the obtained detection value, and computer equipment 50 that notifies contents matching the handling information signals. The electrostatic capacitance sensor 10 is formed of bendable light-permeable base material 11 that is pasted to the storage bag 1 and oriented in the vertical direction and plural light-permeable detecting electrodes arrayed in the XY direction of the base material 11.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】 医療用の液体が僅かに傾いた場合にも液体を高精度に検出でき、液体の液面の微細な変化を検出等できる医療用液体の液面検出装置を提供する。【解決手段】 貯蔵バッグ1に貯えられた薬液3の液面の変化を検出し、薬液3の液面の変化の検出により、貯蔵バッグ1の交換時期を報知する装置であり、貯蔵バッグ1に貯えられた薬液3の変化に伴う静電容量の変化を検出する静電容量センサ10と、静電容量センサ10が検出した静電容量の変化から薬液3の液面の変化を検出し、検出した検出値を用いた取扱情報信号を生成・送信する検出ユニット20と、取扱情報信号に応じた内容を報知するコンピュータ機器50とを備え、静電容量センサ10を、貯蔵バッグ1に貼着されて鉛直方向に指向する屈曲可能な光透過性の基材11と、基材11のXY方向に配列される光透過性の複数の検出電極とから形成する。【選択図】 図1
