Available for work tube outer diameters 60, 70 & 86 mm. Tube furnace work tube package for vacuum atmosphere is suitable for vacuum pressure to 10 -2 mbar or 10-5 mbar depending on type of vacuum pump used (page 110) and contains:
1)  Extended length work tube
2)  Radiation shields suitable for horizontal or vertical use:
1 x standard
1 x thermocouple access slot
3)  Work tube end seals:
1 x NW16 vacuum flange + thermocouple gland
2 x end plates: 1 x NW25 (compatible with low vacuum pump package); 1 x NW40 for 60 mm work tube outer diameter or 1 x ISO-K 63 for 70 & 86 mm work tube
outer diameters (compatible with high vacuum pump package)
4)  Probe thermocouple access:
a: Up to 1200°C:
Probe thermocouple gland complete with type N thermocouple
b: Above 1200°C:
10 mm gland with PTFE seal and blanking plug to suit optional type R or B or 20/40 probe thermocouple assembly