Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking in the nature of supervision, emergency in the nature of life-saving and teaching apparatus and instruments, namely, electronic chips pre-programmed with calibration data and factory settings, integrated circuits, pressure sensors, gas sensors, pollutant sensors, optical sensors, temperature sensors, heat sensors, hygrometers, humidity sensors, mass flow sensors for metering purpo...