Process analysis instrument

The utility model provides a process analysis instrument, is including measuring battery and analysis circuitry. It includes and is used for exposing in the gaseous solid -state electrochemistry oxygen sensor of process by the configuration to measure the battery. Analysor coupled circuits is to solid -state electrochemical sensor with the electrical parameter of measuring solid -state electrochemical sensor and provide the output of the oxygen in the instruction process gas. The DC bias circuit is configured as when solid -state electrochemical sensor is in reducing environment, and optionally uses the direct current to offset to solid -state electrochemical sensor.