Illuminometers; Luminoflux meters; Microhardness testers; Speedometer testers; Battery testers; Electronic spectrophotometer for use in identifying and measuring colors; Gas testing instruments; Scientific apparatus, namely, spectrometers and parts and fittings therefor; Spectrograph apparatus; Thermo-hygrometers; Anemometers; Electronic ultrasonic test equipment, namely, ultrasonic flaw detectors, thickness testers and hardness testers, for non-medical use; Vacuum gauges; Electrical voltage ...