HIGH TEMPERATURE, HIGH PRESSURE (HTHP) RADAR LEVEL GAUGE

摘要

A radar level gauge using comprising a transceiver, processing circuitry, a signal propagating device, and a wave guide arrangement connecting the transceiver with the signal propagation device. The wave guide arrangement includes a hollow wave guide, a first filling member made of a first dielectric material, which first filling member is arranged inside the hollow wave guide, and a second filling member made of a second dielectric material, which second filling member is arranged inside the hollow wave guide outside the first filling member with respect to the tank. The second filling member is fixed in the wave guide at least in a direction out from the tank, and is configured to withstand temperatures up to 250 degrees Celsius.;During conditions of temperatures sufficiently high to soften the inner filling member, the outer filling member will thus serve to prevent the first filling member from being forced out of the wave guide.

主权项

1. A radar level gauge using electromagnetic waves for determining a filling level of a product in a tank, said radar level gauge comprising:
a transceiver for transmitting an electromagnetic transmit signal and receiving an electromagnetic echo signal; processing circuitry connected to said transceiver for determining said filling level based on said electromagnetic echo signal; a signal propagating device adapted to direct said electromagnetic transmit signal towards a surface of said product and to return a reflection from said surface as said electromagnetic echo signal, and a wave guide arrangement, connecting said transceiver with said signal propagation device, said wave guide arrangement including
a hollow wave guide,a first filling member made of a first dielectric material, which first filling member is arranged inside the hollow wave guide, anda guide filling member made of a second dielectric material, which second filling member is arranged inside the hollow wave guide outside said first filling member with respect to said tank, wherein said second filling member is fixed in said wave guide at least in a direction out from said tank,wherein said second dielectric material is configured to withstand temperatures up to 250 degrees Celsius.