Measuring equipment and apparatus, namely, gauges, in particular in relation to pressure, absolute pressure, differential pressure, temperature, quantity of flow volume, humidity, force, acceleration, path, angle, speed, density, and level; manometers; mano-vacuum meters; barometers; altimeters; thermometers, not for medical purposes; thermocouple; thermo-hydrometers; hydrometers; pressure sensors; flow meters; pressure gauges; measuring apparatus, namely, measuring converters; electric measuring transducers with electronic output signals, in particular pressure measuring transducers, differential pressure transducers, level measuring transducers, remote indicators, control and regulating apparatus, flow monitors, electric relays, electric contactors, position controllers; electric and fluidic equipment and apparatus included in this class, namely, electric supply apparatus, electrical amplifiers, electrical circuitry, electric circuit elements and recording apparatus; calibrators and calibration devices, in particular pressure compensators; electric switches, in particular pressure switches, limit switches, level switches, non-contact magnetic switches, optical switches, inductive switches, capacitive switches, electric switches designed as float switches, electric switches designed as motion detectors, and electric switches designed as metal detectors; electric switching equipment for level control of liquids on the basis of the electrical conductivity of the liquid concerned; electric and electronic control apparatus, namely, electric control panels; electric temperature controllers for speed counting, speed control, stop-motion detecting, revolution-safety monitoring, level indication, limit monitoring, phase control, machine control and machine monitoring; electric time relays; electric measuring adapters, namely, electric adapter cables; measuring equipment holders