Abstract: A sensor for a security system is disclosed to detect intrusions at one or more predetermined locations wherein each location includes a moveable member which must be moved in order to intrude the location. The system includes a fiber network routed in close proximity to one or more locations. The sensor comprises a sensor housing for being disposed at a location to detect a predetermined movement of the moveable member from a secure position to an unsecured position, and means for mounting the sensor housing in a stationary position at the location without a physical connection to the moveable member. The sensor housing includes a fiber inlet and a fiber outlet, and a fiber chamber for receiving a predetermined sensor fiber of the fiber network being routed through the sensor housing.

Abstract: Bleached wood pulp is treated with a sulphite after bleaching and before or during flash drying to reduce the formation of nodules of agglomerated wood pulp fibres in the dried pulp, particularly in short fibre pulp from hard woods such as birch and eucalyptus. The sulphite is preferably added to the bleached pulp in the form of an aqueous solution of an alkali metal sulphite for example a 0.4 to 5 percent by weight solution of sodium sulphite. The process of the invention is particularly suitable for drying pulp which is at an acid pH due to residual acids remaining on the pulp from the bleaching process, for example pulp bleached by treatment with chlorine dioxide.