Gauges, dials, meters; measuring instruments; data logging apparatus; analogue control apparatus; analogue to digital data converters; digital to analogue data converters; multimeters with an analogue read out; apparatus for data storage; electrical sensors, pressure sensors, accelerometers, resistance sensors, temperature sensors, thermocouple sensors, magnetic speed sensors, gyro sensors and linear position sensors; potentiometers; ancillary input and output devices; beacon transmitters and receivers; electronic module calibrators, other than for medical use; module testing units; apparatus for diagnosing, detecting, observing, monitoring, warning and alarming; visual and audible monitors and alarms; software and computer programs; computer software for analysing data; liquid crystal displays; light emitting gauges, dials, meters; electric cables; ammeters, voltmeters, ohmmeters, odometers, tachometers, altimeters, clinometers, speedometers, thermometers, hydrometers, inclinometers, proximity meters, displacement meters, fuel gauges, oil gauges, pressure gauges; electronic compasses; engine analysers; engine diagnostic apparatus; engine diagnostic instruments; engine room meters; internal combustion engine testing apparatus; internal combustion engine tuning instruments; data processing apparatus; measuring instruments and gauges, dials, meters for motor vehicles, motorbikes, marine vehicles; measuring devices and display instruments and gauges for exhaust gas temperature, distance, acceleration, rotational speed, torque, revolutions per minute (rpm), pressure, fluid supply, filling level, speed, altitude, temperature, boost pressure, power, air quality, air mass flow rate, oil level, oil pressure, position, rudder position, displacement, displacement distances, wind speed, water depth, weight or load; distribution boxes for electrical power