Fiber Opt Ic Chemical Sensors For Industrial And Process Control

Fiber Optic Sensors Have Been Developed For Monitoring In-Plant Gaseous Emissions Of Ammonia, Formaldehyde, Organohalides, Hydrogen Sulfide, Carbon Dioxide, Oxygen And Nitrogen Dioxide. In Addition, Industrial, Process Control Sensors For Real-Time Process Or Effluent Monii0R1Ng Have Been Developed For Measuring The Aqueous Concentrations Of Such Ions As H+, Na4, K+, Uov, As Well As Organohalides. Some Of 1Hese Fiber Optic Sensors, Or Optrodes, Are Reversible And Are Engineered To Remain In Place For Periods Up 10 One Year. Other Op1Rodes Are Nonreversible And Require Replacemen1 Of 1He Sensor Tip Every 1-2 Days. The Design And Sensitivity Of Selected Optrodes Are Described As Well As Applications.