| HSR Designation | 66A | HSR704EU | HSR705 | Santovac 5 | |
|---|---|---|---|---|---|
| Type | Mineral oil | Silicon oil | Silicon oil | Pentaphenyl ether | |
| Vapor pressure at 20°C in mbar | 4∙10-8 | 2∙10-8 | 3∙10-9 | 1∙10-10 | |
| Resistance (chemical, oxidation, thermal) | Good | Better | Better | Very good | |
| Optimal working pressure range in mbar | 5∙10-7 – 1∙10-3 | 1∙10-7 – 1∙10-3 | 1∙10-8 – 1∙10-3 | 1∙10-8 – 1∙10-3 | |
| Final pressure in mbar | |||||
| LN2 cooling | <6∙10-9 | <6∙10-9 | <6∙10-9 | <6∙10-9 | |
| Refrigeration unit at -20°C | <6∙10-8 | <6∙10-8 | <6∙10-8 | <6∙10-8 | |
| Water cooling at 20°C | <4∙10-7 | <6∙10-8 | <3∙10-8 | <3∙10-8 | |
| Air cooling at 25°C | <1∙10-6 | <5∙10-7 | <2∙10-7 | <2∙10-7 | |