Gas meters; water meters; electricity meters; flow meters; flow meters and fluid meters for gas, water and electricity and structural parts related thereto; smart energy meters for tracking and monitoring energy usage; fluid oscillators, electromagnetic static flow meters, electronic and mechanical electricity meters and structural parts related thereto; pressure regulators for use with flow meters, energy meters and electricity meters and structural parts related thereto; gas flow meters used with flow meters; energy meters for tracking and monitoring gas, fluids, and electricity usage.