Advanced Technologies Group (ATGI) develops mechanical components and systems, instrumentation and controls, systems integration, cryogenics, analysis and simulation. Specific challenges addressed by ATG have resulted in development of the following technologies: optical mass gauge sensor for zero-gravity applications, portable electronic composite railroad track loading tool, optical mass flow sensor, hybrid gas turbine seals, liquid oxygen home healthcare sensor, optical quality sensor, active rotor balancing system, solid hydrogen mass gauge, rocket engine test stand cryogenic instrumentation, hybrid non-contacting seals for advanced gas turbine engines, aircraft fuel gauge, and combat personnel detection/recognition alert system.