A DRY AIR UNIT FOR A CRYOGENIC SCIENTIFIC REFRIGERATION SYSTEM. THE UNIT IS A COMPRESSOR THAT TAKES IN ROOM AIR, COMPRESSES AND FILTERS IT TO GIVE OUT DRY AIR. AS WITH ANY OPEN FLOW LOW TEMPERATURE DEVICE , IT IS CRUCIAL TO SHROUD THE CRYOGENIC NITROGEN GAS STREAM IN A SECOND DRY GAS STREAM TO PROVENT ATMOSPHERIC MOISTURE FROM FREEZING ON THE CRYSTAL. THE UNIT IS USED TO PROVIDE DRY AIR FOR THE OUTER GAS STREAM. FEATURES VARIABLE FLOW UP TO 25 LITRES/ MINUTE DRY AIR WITH A DEW POINT OF BETER THAN - 60 DEGREES C LONG SERVICE INTERVALS (APPROX 12,000 HOURS)

CLASSIFICATION HAS BEEN DETERMINED IN ACCORDANCE WITH THE FOLLOWING:- GENERAL INTERPRETATIVE RULES (GIR)S: GIR 1 HAS BEEN USED TO CLASSIFY THIS PRODUCT BY THE TERMS OF HEADING 8415 AIR CONDITIONING MACHINES, COMPRISING OFA MOTOR DRIVEN FAN AND ELEMENTS FOR CHANGING THE TEMPERATURE AND HUMIDITY, INCLUDING THOSE MACHINESIN WHICH THE HUMIDITY CANNOT BE SEPARATLEY REGULATED: GIR 6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL 841583 OTHER THAN WALL OR WINDOW TYPES, SELF CONTAINED OR SPLIT SYSTEMS, OR OF A KIND USED FOR PERSONS , IN MOTOR VEHICLES, CN CODE 84158300O THER THAN INCOPORATING A REFRIGERATING UNIT TARIC CODE 8415830090 OTHER THAN FOR USE IN CIVIL AIRCRAFT ALSO CLASSIFIED IN ACCORDANCE WITH: HSEN'S NOT (2) TO CHAPTER 8415