9 Scientific, research, optical, weighing, measuring, signalling, detecting, testing, inspecting, apparatus and instruments, namely, apparatus for recording and reproduction of sound, images or data; signal conditioning and communication devices for industrial process control; apparatus and instruments for controlling and monitoring of calculating machines, even at a distance; motion sensors; position, pressure, deformation, force, humidity, temperature, voltage, and current sensors; potentiometer; thermocouples; thermometers, not for medical purposes; piezoelectric sensors; electrical and fiber optic controls for calculating machines and engine hour meters; pressure, speed, temperature and quantity indicators; acoustic alarms; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity, namely, electricity limiters, electricity meters, and electricity conduits; voltage regulators for electric power; electric relays; switchboards; electric control panels; electricity distribution boards; power electronic converters; audio-frequency transformers; power supply apparatus in the nature of batteries; integrated and printed circuits; electronic circuit cards; electrical inductors; inverters; lighting ballasts; electrical transducers; electric transformers; electric switches; electric circuit closers; differential switches; switches, electric; electronic proximity sensors and switches; apparatus and instruments for recording, transmitting, reproducing or processing data; downloadable or recorded computer software for database management; recorded computer programs for word processing; downloadable industrial process control software; thermostats; electronic timers; computer and peripheral devices for computer; interactive touch screen terminals; interfaces for computers