Abstract: Apparatus adapted to detect fluid in a conduit arrangement (100, 101) includes a first fluid sensor (102) and a second fluid sensor (104). A fluid detection device (105) is in communication with the first and the second sensors, the device being configured to output a fluid detection signal when both the first and the second sensors detect presence of fluid. In use, the first and the second sensors are positioned at different positions along a conduit arrangement and/or the first and the second sensors are disposed at different radial angles with respect to an axis of a conduit arrangement.

Abstract: This invention relates to liquid leak detectors and detection systems. A liquid leak detector (10) includes a first electrically conducting layer (12), a second perforate, open, porous and/or permeable electrically conducting layer (13) opposed to said first layer and an intermediate perforate, open, porous and/or permeable electrically non-conducting layer (14) for electrically isolating the two conducting layers (12, 13) whilst allowing liquid, which passes through the second conductor (13), to form an electrically conducting path between the conductors (12, 13).

Abstract: This invention relates to liquid leak detectors and detection systems. A liquid leak detector (10) includes a first electrically conducting layer (12), a second perforate, open, porous and/or permeable conducting layer (13) opposed to said first layer and an intermediate layer perforate, open, porous and/or permeable layer (14) for electrically isolating the two conducting layers (12, 13) whilst allowing liquid, which passes through the second conductor (13), to form an electrically conducting path between the conductors (12, 13).