A sampling plate for use in measuring a property of a fluid sample comprising: a support plate bearing a sample zone laminate structure comprising at least two discrete testing zones for receiving different respective volumes of the fluid sample; wherein each said testing zone has a zone volume defined by a respective zone area (A) across the support plate and a respective zone height (Z1, Z2) above the support plate being a dimension transverse to the zone area; zone heights of the at least two testing zones are different relative to each other; and, the sampling plate comprises a plurality of separate air-porous layers mutually spaced by a non-porous spacer layer in said dimension transverse to the zone areas, to form said laminate structure as a laminate of layers upon the support plate; wherein each spacer layer comprises hydrophilic material, and each air-porous layer comprises an air-porous body of hydrophobic material and receives air displaced from a testing zone as the fluid sample is received into the testing zone; and, wherein a said air-porous layer comprises an empty portion arranged to receive and contain the liquid within a respective testing zone, such that the air porous body is located around the perimeter of the respective testing zone to define at least a part of a wall of the respective testing zone and such that a floor or ceiling of a respective testing zone is free of said air-porous body; and, wherein a said spacer layer forms a said floor or ceiling in one or more said testing zones and forms, at one or more other said testing zones, an empty portion arranged therein in register with a said empty portion of an air-porous layer of a respective other testing zone(s) of the laminate structure, thereby providing the at least two discrete testing zones for receiving and containing different respective volumes of the fluid sample. a support plate bearing a sample zone laminate structure comprising at least two discrete testing zones for receiving different respective volumes of the fluid sample; wherein each said testing zone has a zone volume defined by a respective zone area (A) across the support plate and a respective zone height (Z1, Z2) above the support plate being a dimension transverse to the zone area; zone heights of the at least two testing zones are different relative to each other; and, the sampling plate comprises a plurality of separate air-porous layers mutually spaced by a non-porous spacer layer in said dimension transverse to the zone areas, to form said laminate structure as a laminate of layers upon the support plate; wherein each spacer layer comprises hydrophilic material, and each air-porous layer comprises an air-porous body of hydrophobic material and receives air displaced from a testing zone as the fluid sample is received into the testing zone; and, wherein a said air-porous layer comprises an empty portion arranged to receive and contain the liquid within a respective testing zone, such that the air porous body is located around the perimeter of the respective testing zone to define at least a part of a wall of the respective testing zone and such that a floor or ceiling of a respective testing zone is free of said air-porous body; and, wherein a said spacer layer forms a said floor or ceiling in one or more said testing zones and forms, at one or more other said testing zones, an empty portion arranged therein in register with a said empty portion of an air-porous layer of a respective other testing zone(s) of the laminate structure, thereby providing the at least two discrete testing zones for receiving and containing different respective volumes of the fluid sample. <EOS>