HUYERDO

Carbon dioxide detectors; Electronic data loggers; Gas testing instruments; Infrared detectors; Power adapters; Protective eyewear; Radiation detectors; Radiation gauges used for measuring the physical properties of materials; Radiation-measuring instruments; Thermo-hygrometers; Wind indicator, namely, powder for use in detecting and analyzing air currents; Wind indicator, namely, smoke for use in detecting and analyzing air currents