Regarding the filling fluid for pressure gauges
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I would like to ask everyone: What are the different types of fill fluids used in pressure gauges, and in what situations is each type used? Thank you all for your help.
Additionally: What are the common types of filling fluids used for sealing pressure gauge diaphragms, and in what applications are they used? Thank you so much!
The instrument relies on damping fluid filled inside (silicone oil, glycerin)
I’m sorry: Could the kind person upstairs please explain it to me in more detail?
Regarding the selection of filling fluids for several diaphragm pressure gauges: Name of the filling fluid, Temperature range of the diaphragm device/°C, Purpose, Normal operating temperature of the instrument/°C. Silicone oil (low viscosity): -40～130; generally used in ranges of -30～50. Silicone oil (high viscosity): -30～240; used in high-temperature applications; temperature range: -20～60. Fluorinated oils: -30～160; suitable for use with salts and acids; temperature range: -20～50. Glycerin (glycerol): -5～100; used in food-related applications; temperature range: -5～40. Propylene glycol: -30～100; used in food-related applications; temperature range: -20～40