Patent ID: 7379178

Claim:
A flow through cell for use in a spectrophotometer for analysis of dissolved chemical substances in a flowing liquid stream, comprising a plurality of body members including an intermediate body member located between two other body members, the plurality of body members being clamped together and providing a small volume flow through passage, a resilient sealing gasket located between facing surfaces of the intermediate body member and, respectively, each of the two other body members, wherein a first portion of the flow through passage comprises a hole through the intermediate body member together with a liquid inlet region at one end of the hole and a liquid outlet region at the other end of the hole, wherein each gasket includes a gallery aligned with respective adjacent ends of said hole which provides said first portion of the flow through passage, wherein the two other body members are each associated with an optically transparent window aligned with a respective end of the hole through the intermediate body member thereby providing an optical pathway through said first portion of the flow through passage, wherein the liquid inlet and liquid outlet regions are provided by respectively, an inlet portion and an outlet portion of the flow through passage through which liquid flows into or out of a said region substantially immediately adjacent the optically transparent window transversely of the direction of the hole.