Scientific, research, navigation, surveying, photographic, audiovisual, optical, weighing, measuring, signalling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments, namely, electronic measuring and control apparatus for measuring filling levels in the nature of rotary paddle level sensors, vibration probes, capacitive and conductive measuring probes, radar measuring probes, measuring probes with guided microwave and ultrasonic probes not intended for medical p...