U.S. Patent Specifications Available to Purchase

An exhaust gas analyser, comprising a plurality of bleeder conduits each discharging to the atmosphere, and arranged in scries relation, the first of which is connected to a preceding exhaust gas conduit between the latter's ends, to bleed therefrom a part only of its flow of exhaust gas, and the last of which is similarly connected between the ends of the preceding one, suction means at the discharge end of each bleeder conduit to draw therethrough the gases bled from the preceding conduit, and analysing mechanism, the last bleeder conduit passing through said analysing mechanism.