What are the common types of oxygen analyzers?

Common oxygen analyzer types: Paramagnetic (measures magnetic susceptibility of O2 - accurate, no consumables, used in process applications), Electrochemical/Galvanic (fuel cell generates current proportional to O2 - portable, low cost), Zirconia (solid electrolyte at high temperature generates voltage based on O2 partial pressure - combustion control), and Tunable Diode Laser (TDLAS - optical absorption, fast response). Selection depends on application, concentration range, response time, and environmental conditions.