Abstract: A detector (10; 110) is provided for mounting to a container (2) defining an internal space (6) in order to determine occupancy of the container. The detector includes a housing (12; 112), a mounting arrangement for mounting the housing to a container, a sensor arrangement comprising a first sensor (30; 130) disposed within the housing, the first sensor configured to determine a concentration of carbon dioxide within an internal space (6) of a container (2); and a control system (40; 140) configured to receive input values from the first sensor and to provide an output when the concentration of carbon dioxide exceeds a predetermined value. The housing is substantially sealed for preventing the ingress of debris into the housing, and the housing is configured such that air is able to flow into the housing and over the first sensor.

Abstract: Apparatus and a method for collecting and redirecting liquid which has been separated from a gaseous process stream by inertial separation techniques such that the separated liquid and gaseous stream are flowing co-currently or counter-currently within the same process apparatus. The apparatus has liquid catch means, such as a flange, for catching the separated liquid and flow-through means, such as a flow-through opening in the flange, for simultaneously allowing the gaseous materials to flow, co-currently or counter-currently with the separated liquid, through and past the liquid catch means and downstream on to further processing equipment. The method comprises collecting the separate liquid phase by patching the separate liquid phase as it drips and flows down the inner wall of the process apparatus, while simultaneously allowing the gaseous materials to flow on, co-currently or counter-currently with the separate liquid phase, to further processing equipment, using the aforesaid apparatus.