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Cryogenic seal for radar level sensors

19 January 2009

Emerson Process Management has introduced a cryogenic seal for its Rosemount 5300 Series of high performance Guided Wave Radar (GWR) level transmitters. The seal enables accurate, reliable level measurement of condensed and liquefied gasses at very low temperatures (to -196 degrees).

Cryogenic seal for radar level sensors
Cryogenic seal for radar level sensors

The seal offers benefits to all industries where liquefaction of gasses occurs. These gasses include natural gas, ethane, propane, butane, LPG, NGL, ethylene, nitrogen, inert gasses and carbon dioxide. The hermetic, gas-tight and robust construction also offers a safe and reliable seal solution for measuring liquefied anhydrous ammonia.

The transmitter seal provides multiple layers of protection using a temperature and pressure barrier in a flexible assembly to handle forces induced by probe movement and temperature variations. A second brazed hermetic, gas-tight seal provides additional protection. The entire assembly is welded into a stainless steel sleeve for total robustness.

The two-wire technology of the Rosemount 5300 enables fast and inexpensive installation. Foundation fieldbus, Hart and PlantWeb functionality means the transmitter integrates easily into new or existing control systems. This results in a quicker return on investment with overall improved uptime and enhanced safety.

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