The BSO-01 is an inert fill fluid and has a reported freezing point of -125°C. The (operational) process temperature limit is set at a higher temperature to allow the Diaphragm Seal System to function properly.
In short, the BSO-01 can be used
• Typically for low temperature applications
• In silicon free environments
• For chlorine and oxygen applications
• As primary fill for Temperature Compensator.
More information:
Datasheet: PDS_DS_BSO-01_Fill_Fluid_Badotherm.pdf