Patent ID: 7137286
Filing Date: 2006-11-21
Classification: G01N

Abstract:
1. A gas chromatograph set comprising: a plurality of gas chromatographs, each of which includes a column for separating sample-components, a carrier gas supply unit for supplying a carrier gas to the column, and a detector for detecting eluted components from the column; the carrier gas supply unit comprising a plurality of carrier gas passages, and a flow controller unit for controlling a flow-rate that is connected to each carrier gas passage; and a flow passage assembly having high thermal conductivity comprising an upper metal plate, a lower metal plate and a middle metal plate connected to and between the upper and lower metal plates to define from the of the plurality of the carrier gas passages, wherein the flow controller unit is attached to the upper metal plate of the flow passage assembly and wherein the middle plate is formed with a plurality of grooves and middle plate through holes, the upper plate is formed with a plurality of flow passage through holes and a plurality of upper plate through holes and the lower plate is formed with a plurality of lower plate through holes, the pluralities of upper plate through holes, middle plate through holes and lower plate through holes being in aligned registration with one another when the upper plate, middle plate and lower plate are connected together.