Patent ID: 8154714

Claim:
A gas analyzer, comprising: a) a detector section including a detector; b) a source section including a light source; c) a first optical window coupled with the detector section; d) a second optical window coupled with the source section; and e) a removable gas cell removably disposed between the source and detector sections, the removable gas cell including: a housing structure defining a gas flow channel, wherein the light from the light source passes through the gas flow channel to the detector section along a light path; a gas inlet port; a gas outlet port, wherein the inlet and outlet ports are located on the housing structure; a first temperature sensor adapted to measure a temperature of gas flowing in the flow channel; and a pressure sensor located at an interior point of the housing structure in the gas flow channel, the pressure sensor adapted to measure a pressure of the gas at an interior point in the flow cell, wherein the first and second optical windows provide an airtight seal for components within the source and detector sections.