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A method and apparatus for monitoring hydrogen and optionally a non-hydrogen gas including carbon monoxide. The method and apparatus includes a sensor assembly consisting of a plurality of electrochemical cells sequentially arranged in a path of the hydrogen-containing gas stream. Reaction and consu

A method and apparatus for monitoring hydrogen and optionally a non-hydrogen gas including carbon monoxide. The method and apparatus includes a sensor assembly consisting of a plurality of electrochemical cells sequentially arranged in a path of the hydrogen-containing gas stream. Reaction and consumption of hydrogen at catalytically reactive surface areas of the cells generates a current which is proportional to the amount of hydrogen in the gas stream entering the sensor.

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A method and apparatus for monitoring hydrogen and optionally a non-hydrogen gas including carbon monoxide. The method and apparatus includes a sensor assembly consisting of a plurality of electrochemical cells sequentially arranged in a path of the hydrogen-containing gas stream. Reaction and consu

A method and apparatus for monitoring hydrogen and optionally a non-hydrogen gas including carbon monoxide. The method and apparatus includes a sensor assembly consisting of a plurality of electrochemical cells sequentially arranged in a path of the hydrogen-containing gas stream. Reaction and consumption of hydrogen at catalytically reactive surface areas of the cells generates a current which is proportional to the amount of hydrogen in the gas stream entering the sensor. ionally comprises an organic luminescent material, and wherein said mixed region is capable of emitting light in response to hole-electron recombination; (iii) a second electrode; (iv) an optional thermal layer coated on at least one of the first and second electrodes, wherein one of said first and second electrodes is a hole injection anode, and one of said electrodes is an electron injection cathode, and wherein the organic light emitting device further comprises at least one of (v) a hole transport region interposed or situated between the first electrode and the mixed region; and (vi) an electron transport region interposed or situated between the mixed region and the cathode. Illustrated in copending application U.S. Ser. No. 09/935,031, filed Aug. 22, 2001 on “OLEDs Having Light Absorbing Electrode”, U.S. Publication No. 20030038593, the disclosure of which is totally incorporated herein by reference, is an organic light emitting device comprising a first electrode; a second electrode; and a luminescent region including an organic electroluminescent material between the first electrode and the second electrode, wherein one of the first electrode and the second electrode includes both a substantially transparent charge injecting layer adjacent to the luminescent region and an electrically conductive light absorbing layer. Illustrated in U.S. Pat. No. 6,392,339 on “Organic Light Emitting Devices Having Improved Efficiency and Operation Lifetime”, filed on Jul. 20, 1999, the disclosure of which is totally incorporated herein by reference, is an organic light emitting device, comprising, for example, a mixed region comprising a mixture of a hole transport material and an electron transport material, one of the hole transport material and the electron transport material being an emitter, the mixed region having a first surface and a second surface; at least one of (i) a hole transport material on the first surface, and (ii) an electron transport material on the second surface; an anode in contact with the hole transport material on the first surface or with the first surface; and a cathode in contact with the electron transport material on the second surface or with the second surface; and U.S. Pat. No. 6,392,250 on “Organic Light Emitting Devices Having Improved Performance”, filed on Jun. 30, 2000, the disclosure of which is totally incorporated herein by reference, is an organic light emitting device, comprising, for example, a mixed region having a first surface and a second surface, the mixed region comprising a mixture of a hole transport material, an electron transport material and at least one dopant, the dopant being an emitter, at least one of the hole transport material and the electron transport material optionally being an emitter; at least one of (i) a hole transport region on the first surface, and (ii) an electron transport region on the second surface; an anod