Scientific surveying, optical, weighing, measuring, signaling, checking, life-saving and data transmission apparatus and instruments for measuring, checking, testing, protecting, regulating, and monitoring physical properties, namely, loads, forces, weight, displacements, pressures, temperatures, vibrations, torques, speed and ice formation) in industrial processes, in manufacturing installations, in energy production installations, in buildings, in machines and machine tools as well as in vehicles for locomotion by land, air, water or space, namely, accelerometers and piezoelectric accelerometers, ice sensors, dynamic pressure sensors, vibration velocity sensors, air gap sensors, speed sensors, proximity probes for relative vibration and displacement, speed probes, transducers for ice detection, dynamic pressure, vibration velocity, air gap and speed, ice detection systems consisting primarily of ice sensors and de-icing controllers; rotor track and balance monitors, oil debris monitors, fluid level sensors, electric chip detectors, magnetic chip collectors, load and force sensors, displacement transducers, rotary transmitters, condition monitors, signal conditioners and modular vibration signal conditioners, galvanic separators, vibration monitors, remote signal interfaces, monitors and protection monitors, controllers, computer hardware and computer programs for controlling, measuring, checking, protecting, testing and monitoring the aforementioned apparatus and instruments; and parts for all the aforementioned goods