40.70.00 Instrumentation for Process Systems
40.72.00 Level Measurement
40.72.13 Ultrasonic Level Meters (Continuous and Point-Type) 40.72.23 Radar Level Meters 40.72.26 Laser Level Meters 40.72.29 Nuclear Level Meters 40.72.33 Capacitance Type Level Meters (Continuous and Point Type) 40.72.36 RF Admittance Level Meters (Continuous and Point Type) 40.72.43 Pressure and Differential Pressure Type Level Meters 40.72.46 Bubbler Systems 40.72.53 Magnetic and Magnetostrictive Level Meters 40.72.63 Displacement-Type Level Meters 40.72.73 Sight Level Gauges 40.72.76 Level Switches 40.72.83 Leak Detection Systems