Patent ID: 8305086

Claim:
A flame ionization detector comprising: a supply and an ignition device ( 7 ) for a combustible gas, a supply for a sample gas, a combustion chamber ( 4 ) wherein the sample gas is ionized by a flame, electrodes ( 8 , 1 ) situated inside the combustion chamber, to which a voltage is applied for generating and measuring an ion current, wherein the detector is constructed as an integrated planar system of at least three parallel planar substrates ( 1 , 2 , 3 ) that are bonded to one another in a sandwich configuration, wherein a central substrate ( 1 ) comprises nozzles ( 5 , 6 ) for the gases and the ignition device ( 7 ) and a recess which forms a part of the combustion chamber ( 4 ), and wherein the combustion chamber is formed by recesses in a top and bottom substrate ( 2 , 3 ) and is essentially closed together with the nozzle region by the top substrate and the bottom substrate ( 2 , 3 ), the top and bottom substrates ( 2 , 3 ) comprise supply channels ( 10 , 11 ) for the gases.