9 [ Observation instruments and photo telegraphy apparatus, namely, cameras, video, computer and tele-operation monitors for mining, ] industrial and plant monitoring; optical, mechanical and electric sensors in the nature of environmental, induction, magnetic, ultrasonic, capacitance, optic sensors and controllers and strain gauges therefor, software for the operational management, monitoring and communicating between electrical, electronic and control equipment and systems; electronic control equipment for mining, namely, collision warning system, control devices for mining machines and for mining machines with intrinsically safe and flameproof design; fiber optic controllers and switches for tagging and tracking, VoIP controller for transfers of speech messages via digital data networks, traffic management controller for controlling mining equipment, tracking controller for mining equipment, fuel management controller for mining equipment, access controller for mining equipment, conveyor controller; intercommunication systems, namely, computer communications servers and wireless communication devices for voice, data or image transmission; electrical switchgear and transformers; converters; magnetic switches; measuring and analysis equipment, namely, filling level measuring instruments and detectors; transponders, transducers and transceivers including electromagnetic, radar, license free band transponders / transceivers and bar code, optical, smart card readers; communication technology systems, namely, Radio and wireless based devices for data, video and audio communication including handheld radio and wireless phones, amplifiers and wireless access point devices, leaky feeders, namely, cables for transmission of data; wireless mesh networks of sender and receiver transmitters, wireless transmitters, wireless local area networks; terrestrial trunked radio (TETRA), digital surface and underground radio, micro wave transmission apparatus for delivering radio programs and messages; software systems for monitoring power usage over computer and other networks and their accessories, namely, junction boxes, intrinsically safe switches, namely, net connectors using low energy; routers, telephones, VoIP controllers, wireless handheld computers, wireless personal digital assistants, and flame proof PC and programmable logic controllers (PLC), antennas, telecommunication switches, coupler and other devices, namely, fiber optic and copper-based plugs, and sockets; fiber optic connectors and distribution devices for fibre optic and copper cable-based networks; computer cable for data transmission; electrical and electronic accessories, namely, coupler, plugs, adapters, battery chargers, connections for electric and fiber optic lines and cable