Electrochemical oxygen analyzers are critical instruments for measuring oxygen concentration in various applications, from industrial process control (e.g., chemical manufacturing, oil refining) to environmental monitoring (e.g., stack gas analysis, wastewater treatment) and medical settings (e.g., anesthesia delivery systems). The accuracy, reliability, and suitability of these analyzers directly depend on how well their core parameters align with the specific needs of the application. Selecting the wrong analyzer—due to overlooking key parameters—can lead to incorrect measurements, process inefficiencies, safety hazards (e.g., explosion risks in oxygen-deficient or oxygen-enriched environments), and unnecessary maintenance costs. To avoid these issues, it is essential to systematically evaluate five categories of core parameters: measurement performance, environmental adaptability, functional design, safety and compliance, and maintenance and cost-effectiveness. Below is a detailed breakdown of each parameter category, including their significance, typical specifications, and application-specific considerations.