Hygrometers; Electronic ultrasonic test equipment, namely, ultrasonic flaw detectors, thickness testers and hardness testers, for non-medical use; Gas detectors for detecting the presence of gas; Infrared thermometers, not for medical purposes; Laser equipment for non-medical purposes; Laser measuring systems; Laser rangefinders; Magnetic stud finders; Measuring apparatus, namely, laser distance meters; Plumb levels; Scientific instruments, namely, electronic analyzers for measuring, testing ...