| 12/5/2023 | 9013200000 | ARGON LASER FOR DEVICE FOR MEASURING THE NUMBER OF CONTAMINATION PARTICLES ON SILICON WAFERS KLA-TENCOR SURFSCAN 6200, NOT FOR SALE, FOR OWN PRODUCTION NEEDS: | XXXXXXXXXX | 1 | N/A | 14372 | Thailand | SHANGHAI |
| 12/5/2023 | 9013200000 | ARGON LASER FOR QUANTITY MEASURING DEVICE | XXXXXXXXXX | 1 | N/A | 14372 | Thailand | SHANGHAI |
| 11/6/2023 | 8539390000 | HOLLOW CATHODE LAMPS. MANUFACTURED FOR 68 CHEMICAL ELEMENTS DETERMINED BY ATOMIC ABSORPTION METHOD. LAMPS ARE NON-CODED. OPERATING PARAMETERS ARE MANUALLY SET. THE HOLLOW CATHODE AND ANODE ARE INSIDE A GLASS TUBE FILLED WITH NEON OR ARGON UNDER A PRESSURE OF ABOUT 10 TORR. THE CATHODE OF THE LAMP IS MADE FROM THE ELEMENT TO BE ANALYZED, OR FROM AN ALLOY CONTAINING THIS ELEMENT. A POTENTIAL OF 200-400V IS SUPPLIED TO THE ELECTRODES OF THE LAMP, CAUSING A GLOW DISCHARGE, WHICH IONIZES THE GAS FILLING THE TUBE TO THE CONDITION OF POSITIVELY CHARGED IONS. THE IONS ARE ACCELERATED AND IMPACT THE INNER WALL OF THE HOLLOW CATHODE, AS A RESULT OF WHICH ATOMS OF THE ELEMENT CONTAINING THE CATHODE ARE RELEASED FROM THE SURFACE AND FORM A CLOUD. WHEN COLLISING WITH GAS IONS, THE ATOMS OF THE CLOUD ARE EXCITED. WHEN THE EXCITED ATOMS RETURN TO THE GROUND STATE, THEY EMMIT LIGHT, USED FOR ANALYSIS IN AN ATOMIC ABSORPTION SPECTROPHOTOMETER. | XXXXXXXXXX | 8 | N/A | 1867 | Thailand | BANGKOK |