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Abstract

There is disclosed a flow-through cell comprising a substrate defining a channel, having an inlet and an outlet, at least a portion of the substrate being light-permeable to allow particles within at least a portion of the channel between the inlet and the outlet to be optically detected through the substrate, wherein the flow-through cell comprises liquid-permeable particle retaining means located downstream of the at least a portion of the channel where particles can be optically detected, for allowing the flow of a liquid sample through the channel from the inlet to the outlet while retaining particles from the liquid sample whose dimensions exceed threshold dimensions within the channel, where they can be optically detected. The flow-through cell is particularly applicable to the detection of micro-organisms in drinking water.

First Claim