Calipers for measuring inside diameter, outside diameter, thickness, depth; Light systems comprising light sensors and switches; Metered gasoline pumps; Metering orifices, namely, orifice plates for metering or controlling the flow rate of liquids; An optical metrology inspection system comprised of a light source, one or more cameras and sensors in communication with computer software and hardware; Centrifugal metering pumps; Digital pH meters; Electric meters; Electrical energy utilization metering devices complete with related software; Electronic metering faucets; Electronic devices, namely, energy meters for tracking and monitoring energy usage; Electronic devices, namely, handhelds for exchanging data in energy meters or submeters; Electronic testing equipment, namely, sound level meters; Electrotechnical vibration meters; Exposure meters for photographic devices; Flow meters; Humidity sensor with integrated digital and analog output circuitry used in automotive, appliance and light industrial applications to sense both relative humidity and temperature environmental conditions; Measuring apparatus, namely, laser distance meters; Occupancy sensors, namely, electronic devices which detect the presence of occupants and control the lighting system accordingly; pH meters; Photographic exposure meters; Scientific measuring instruments, namely, conductivity meters; Sound level meters; Temperature meters not for medical use