The present invention does not need to be kept constantly applying a voltage, the power supply to the operation of the sensor is a simple configuration because it is not necessary, moreover, capable of detecting leakage of urine sensor and the urine leak detection system less leakage of urine with high sensitivity I provide. .. A urine leakage sensor is used by placing in the vicinity of the diaper 10, a positive electrode and a positive lead 12 which is electrically connected to the positive electrode, a negative electrode formed by the ionization tendency higher metal material than positive When, a negative lead 13 is electrically connected to the negative electrode, and electrolyte-containing layer having a water absorption as well as containing and electrolyte is inserted in close contact between the positive electrode and the negative electrode, a positive electrode, electrolyte-containing layer and the anode The is composed of the water cell with an exterior member 11 having a water absorption as well as encapsulated. .. [Selection Figure Figure 1.【課題】電圧を常時印加しておく必要がなく、センサの作動に電源装置が不要であるから構成が簡易であり、しかも少ない尿漏れを高感度で検知可能な尿漏れセンサ及び尿漏れ検知システムを提供する。【解決手段】おむつ近傍に配置して使用される尿漏れセンサ10は、正極と、正極に電気的に接続された正のリード線12と、正極よりイオン化傾向が高い金属材料で形成された負極と、負極に電気的に接続された負のリード線13と、正極及び負極間に密着して挿入されており電解質を含有すると共に吸水性を有する電解質含有層と、正極、電解質含有層及び負極を被包すると共に吸水性を有する外装材11とを備えた水電池から構成されている。【選択図】図1
