Abstract: Proposed is a leak detection sensor module including. The leak detection sensor module includes a body having an inner space in which a substrate, a transmission member, and a fixing body are mounted, the body having a bottom surface provided with a mounting hole in which a cartridge is mounted, the body having a side surface provided with a connection hole, and the body having steps. Furthermore, the leak detection sensor module includes a cover, the substrate to which an emitting portion and a receiving portion are connected and in which a microcomputer is mounted, the cartridge maintaining an opaque state when oil is not absorbed and being converted to a transparent or translucent state when the cartridge absorbs and reacts with a leaked oil, the transmission member transmitting an emitted light, and the fixing body fixing the substrate, the transmission member, the emitting portion, and the receiving portion.

Abstract: Proposed is a cartridge for a leak detection sensor. The cartridge includes a housing having an inner side thereof provided with a mounting space portion in which a reaction material is mounted, the housing having a plurality of fluid moving grooves in which a leaked oil is capable of being moved toward the reaction material and which is formed around an opening portion of a lower portion of the housing by a predetermined distance. Furthermore, the cartridge includes the reaction material being an opaque material, the reaction material being configured to be converted to a transparent state when the reaction material absorbs oil and reacts with an absorbed oil, and includes a separation prevention plate mounted by being fitted into the opening portion of the housing, the separation prevention plate preventing a separation of the reaction material that is mounted by being fitted into the fluid moving grooves.

Abstract: A liquid leak detection sensor has a sensitivity adjustable function, which adjusts a time to sense, that is, the sensitivity of a sensor regardless of whether the viscosity of a leaked liquid is high or low since a sensing position of the sensor can be adjusted according to the viscosity of the leaked liquid and the tilt of an installation place. The sensor includes a fixing connection fixture having a fixing plate with a fixing hole and a connection part formed with an angle adjustment protrusion, which are integrally provided; an insertion connection fixture into which the angle adjustment protrusion of the fixing connection fixture is inserted; a housing coupled to the insertion connection fixture and a substrate inserted into the housing and having a light-receiving unit for receiving light and a light-emitting unit for emitting light; and a lens part installed in the housing.

Abstract: A liquid leak detection sensor has a sensitivity adjustable function, which adjusts a time to sense, that is, the sensitivity of a sensor regardless of whether the viscosity of a leaked liquid is high or low since a sensing position of the sensor can be adjusted according to the viscosity of the leaked liquid and the tilt of an installation place. The sensor includes a fixing connection fixture having a fixing plate with a fixing hole and a connection part formed with an angle adjustment protrusion, which are integrally provided; an insertion connection fixture into which the angle adjustment protrusion of the fixing connection fixture is inserted; a housing coupled to the insertion connection fixture and a substrate inserted into the housing and having a light-receiving unit for receiving light and a light-emitting unit for emitting light; and a lens part installed in the housing.