Selection of on-site level gauges for low-temperature and low-density media
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Medium: Methane. Density: 293.5 kG/m3. Temperature: -98°C. Pressure: 3.04 MPa-G. In-situ liquid level measurement in the reflux tank. Side flange of the tank, with a flange spacing of 1200 mm. I would like to ask if anyone has any good recommendations for on-site level gauges, including brands. Thank you
A float level gauge, I guess. Some magnetic flap switches should also work; check with various well-known brands.
Non-contact methods can be used, as well as waveguides and the like
Differential pressure transmitter, with stainless steel tubes as pressure conduits.
Maglev level indicators are widely used and easy to maintain; even if the display is inaccurate, production staff can easily determine the actual liquid level.
For such low-temperature media, an internal floating ball design is likely the most reliable; however, determining the pressure transfer method presents challenges regarding pipeline insulation and the selection of isolation fluid.