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There are various working tubes available, depending on application and temperatures. The technical specifications of the different working tubes are presented in the following table:
| Material | Tube outside Ø mm | Max. heat-up ramp K/h | Tmax in air °C | Tmax in vacuum operation °C | Gas-tight |
|---|---|---|---|---|---|
| C 530 (Sillimantin) | < 120 | unlimited | 1300 | not possible | no |
| from 120 | 200 | ||||
| C 610 (Pytagoras) | < 120 | 300 | 1400 | 1200 | yes |
| from 120 | 200 | ||||
| C 799 (99.7 % Al2O3) | < 120 | 300 | 1800 | 1400 | yes |
| from 120 | 200 | ||||
| Quartz glass | all | unlimited | 1100 | 950 | yes |
| CrFeAl-Alloy | all | unlimited | 1300 | 1100 | yes |
