Gas analyzer for simultaneously measuring many ingredients

Claim 1

A gas analyzer for simultaneously measuring a plurality of ingredients of a sample gas, comprising: a sample gas-introducing passage; a sample gas flow-dividing and gas-diluting means connected to said gas-introducing passage for dividing the sample gas into a plurality of gas flow in a desired flow-dividing ratio, and simultaneously diluting the plurality of divided sample gas flows, said means having a plurality of parallel connected flow-dividing ratio/dilution ratio setting devices; each of said ratio setting devices having a plurality of parallel connected flow rate limiting elements, and having an inlet manifold providing a space from which said limiting elements extend with the openings into the inlet elements side by side, the outlets from said limiting elements being connected in an outlet manifold, and a valve means movable in said inlet manifold and selectively positionable between individual pairs of element inlet openings and dividing said inlet manifold space into two non-communicating parts, thereby causing the openings on one side of said valve means to open into one part of the inlet manifold space and the openings on the other side of said valve means to open into the other part of said inlet manifold space, said sample gas-introducing passage being connected to one part of said inlet maifold space, and dilution gas supply means connected to the other part of said inlet manifold space; and a plurality of gas concentration detectors, one for the gas flow from each of said ratio setting devices, and connected, in parallel with each other, to their respective outlet manifolds for receiving the respective diluted gas flows from said outlet manifolds of each of said flow-dividing ratio/dilution ratio setting devices.