Analytical Industries Inc., doing business in the industrial marketplace under the trade name Advanced Instruments Inc., has earned a reputation around the world for innovative solutions to gas analysis that encompass the design and manufacture of advanced oxygen sensors, % O2, PPM and PPB O2 analyzers, a passion for reliable quality, and superior customer support. AII has become a leading worldwide supplier of PPB, PPM and % oxygen sensors and analyzers, H2S, CO, Heliox, and Trimix analyzers for industrial process control, natural gas, medical O2 sensors, and sport diving O2 sensors.