9 Electrical and electronic controls and digital systems in the oil and gas industry, namely, transmitters, sensors, industrial remote terminal units, programmable logic controllers; downloadable control programming software for process application programming and visualization, and supervisory control and data acquisition; downloadable computer software, namely, for use in the oil and gas industry for data collection, data management, data analysis, real-time remote monitoring, surveillance, diagnostics and troubleshooting, maintenance planning, asset optimization, and tracking equipment and for use in optimizing oilfield well production; electronic controls and sensors for monitoring and control of oil and gas flow and levels, namely, pressure indicators, recorders, indicators, switches, controllers, transmitters, meters, densitometers, sealed sensor systems comprising as surface measurement instrumentation, including cone meters, coriolis meters, flow computers, chart recorders, orifice meters, ultrasonic flow meters, positive displacement meters, flow analyzers, and flow meters