Abstract: A method and apparatus are disclosed for measuring and monitoring the setting of a crusher, in which method the erosion of the wearing parts of the crusher are monitored by sensors capable of transmitting the measurement data to the crusher's automatic control system. Based on the received measurement data, the control system adjusts the crusher setting so as to maintain the setting at its predetermined value irrespective of the erosion of the crusher's wearing parts. The invention also relates to alternative embodiments of wear sensors for the wearing parts of a crusher. The measurement data indicating the amount of erosion in the wearing parts is transmitted wirelessly to the exterior side of the crusher.

Abstract: A method and apparatus are disclosed for monitoring the amount of erosion in the wearing parts of a crusher, in which method the wearing of the crusher is provided with a wear sensor that issues a signal to the crusher's automatic control system as erosion in the wearing part reaches a predetermined depth. Upon receiving the signal, the control system initiates predetermined actions, such as an alarm, stopping the crusher and/or ordering of a spare part. Information on the amount of erosion in a wearing part is transmitted wirelessly to the automatic control system.

Abstract: A refiner disk sensor (78) and sensor refiner disk (58) for use in sensing or measuring a parameter in a refining zone of a refiner (30). The sensor includes a spacer (114) that isolates a sensing element. In one embodiment, the spacer is made of a material that isolates the element from the disk to prevent disk heat from affecting sensor operation. The sensor preferably also includes a housing (140) carried by the spacer that, in turn, carries the element. Where the element is temperature sensing, the housing is thermally conductive and it an the spacer enclose the element. Each sensor is disposed in the refining surface of a disk. In one embodiment, each sensor preferably is disposed in its own separate bore (96) in the disk flush with or below axial refiner bar height. In another embodiment, the sensor or sensors are part of a removable disk segment (32).