PROBLEM TO BE SOLVED: To protect a sensor or a sensor component (a sensor peripheral material or a sensor protecting material) to be in contact with a detection object from friction (vigorous vibration and frictional heat), abrasion or damages caused by contact, to prevent disturbance in a sensor reception signal, to stabilize a sensor reception signal, to identify and clarify a contact object, and to provide functions of disinfection, sterilization and cleaning of a contact surface.;SOLUTION: An artificial sweat 7 is provided, comprising, as base components, water and at least one kind of water-soluble compound having at least one OH group bonded to a carbon atom. The present invention also provides methods for changing a concentration and a supply amount of each base component to control friction between the contact faces of a detection object and a sensor 11 or a sensor component so as to protect the sensor or the sensor component from frictional heat, abrasion and damages, to stabilize a sensor reception signal, to identify and clarify a contact object and to disinfect, sterilize and clean a contact face of the sensor.;COPYRIGHT: (C)2012,JPO&INPIT
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