Abstract: Provided are a sliding member for pumps in which generation of a wear substance is quickly and accurately grasped even if the wear substance is generated when the sliding member slides while being in contact with another member, and a pump operation state detection system using the sliding member. The pump operation state detection system includes a uniaxial eccentric screw pump, a detection device capable of detecting metal powder in a fluid discharged from the uniaxial eccentric screw pump, and a determination device. In the uniaxial eccentric screw pump, a stator is arranged so as to be exposed to a fluid conveyance path through which the fluid flows. The stator is configured to slide while being in contact with a rotor along with operation of the uniaxial eccentric screw pump. The stator is made of a resin or a rubber and contains 10-30% of metal powder by weight ratio.

Abstract: Provided are a sliding member for a pump in which generation of a wear substance and the like can be quickly and accurately grasped even if the wear substance and the like are generated when the sliding member for a pump slides while being in contact with another member, and a pump operation state detection system for a pump using the sliding member for a pump. A pump operation state detection system (10) includes a uniaxial eccentric screw pump (20), a detection device (100) capable of detecting metal powder in a fluid discharged from the uniaxial eccentric screw pump (20), and a determination device (120). In the uniaxial eccentric screw pump (20), a stator is arranged so as to be exposed to a fluid conveyance path (56) through which the fluid flows. The stator is configured to slide while being in contact with a rotor along with operation of the uniaxial eccentric screw pump (20). The stator is made of a resin or a rubber and contains 10% to 30% of metal powder in terms of a weight ratio.