What is the viscosity of the silicone oil filled inside the flange of a pressure transmitter?
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After checking some information, the normal specific gravity of silicone oil is 0.93； The specific gravity of high-temperature silicone oil is 1.07; so what are their respective viscosities?
The specific gravity of silicone oil No. 200 is 0.93, while that of silicone oil No. 704 is 1.07. There are other types of silicone oils as well, and the specific gravity depends on the particular model. Silicone oil No. 200 is the most commonly used. The viscosity of silicone oil No. 200 is 9.5, while that of silicone oil No. 704 is 44.
Do you mean the viscosity of the silicone oil that is always inside the transmitter?
The viscosity you’re asking about isn’t it the viscosity of silicone oils grade 200 and 704? That’s exactly the viscosity of these two types of silicone oils I’m referring to. These two types of silicone oils are in the capillaries. There is another type of liquid inside the transmitter
Because, for example, with 704 silicone oil, there are many different viscosities, and I’m worried you might think I’m referring to the usual viscosity; what I actually want to know is the viscosity of the silicone oil used in those flange capillaries
Oh, I really don’t know the normal viscosity. The silicone oil filled in the capillary is silicone oil that has had its gas removed through high-temperature stirring.
So 9.5 and 44 must be the viscosity of the silicone oil inside the flange
Yes, the viscosity of the silicone oil in the capillary
I forgot to tell you – Rosemount uses these numbers; I’m not sure if the others are the same