Abstract: Various embodiments of the present disclosure are directed to carbon dioxide and/or hydrogen sulphide sampling and detection system and method for determination of the content of gaseous CO2 and/or H2S in a liquid, among other chemical compounds. In one embodiment, the detection system includes a membrane block having a liquid sample inlet port and a sample outlet port between which a sample flow path extends. The membrane block includes a first membrane unit and a second membrane unit. The first membrane unit includes a sample flow on the first side of a first permeable membrane element, and a carrier gas flow on the second side of the first permeable membrane element. The second membrane unit having a sample flow on the first side of a second permeable membrane element and a carrier gas flow on the second side of the second permeable membrane element.

Abstract: Provided is a system for centralized water monitoring of a fish farm. the system including a plurality of fish tanks divided into a first and a second subgroup; and a first sample conduit only connected to the first of the subgroups through a first set of pipe connections, and a second sample conduit connected only to the second of the subgroups through a second set of pipe connections; each one of the pipe connections being connected to only one fish tank; the pipe connections being configured for water sampling from a selected fish tank of the first subgroup into the first sample conduit and from a selected fish tank from the second subgroup into the second sample conduit. Water samples are received by a first and second sensor system from the first and second sample conduits for simultaneous measurements of the samples by the sensor system.