Abstract: A guided wave radar level gauge adapted for mounting on a nozzle of a tank, including an attachment collar with an opening configured to be aligned with the nozzle and to be secured by means of an annular clamping device, and a transmission line probe attached to an exterior end of a probe connector. The GWR level gauge further comprises an annular sealing gasket fitted in the collar opening, the annular sealing gasket having a central opening through which the central probe connector extends, and a distancing sleeve arranged around the exterior end of the probe connector and having a radially protruding collar portion, wherein processing circuitry is configured to detect an impedance change caused by tank content or condensate which has passed through the central opening of the sealing gasket and collected in an annular space immediately surrounding the radially protruding collar portion.

Abstract: A valve arrangement for a guided wave radar level gauge including a valve housing holding a movable valve element having a through-opening, the movable valve element being configured to be movable between an open position and a closed position. A probe section arranged in the through-opening of the movable valve element. Upper and lower probe sections are located on respective sides of the movable valve element. A spring-loaded connection assembly is configured to form an electrical connection between the upper and the lower probe section via the probe section in the movable valve element when the movable valve element is in an open position.

Abstract: A radar level gauge comprising a signal propagation device, a dielectric filling member arranged in the signal propagation device, and a sealing arrangement for preventing tank content from escaping into the outside environment, wherein the dielectric filling member comprises a main body and a sealing arrangement comprising a first sealing portion. The radar level gauge further comprises a structural reinforcement element positioned above the first sealing portion.

Abstract: A radar level gauge system comprising: a transceiver; an antenna assembly for arrangement at an opening in a tank wall for radiating a transmit signal vertically towards the product in the tank, and to return a reflection signal resulting from reflection of the transmit signal at a surface of the product; and processing circuitry for determining the filling level based on the transmit signal and the reflection signal. The antenna assembly comprises: a non-plastic dielectric antenna body having a convex surface facing away from an interior of the tank and a planar surface facing the interior of the tank, when the antenna assembly is arranged at the opening in the tank wall; and a feed arranged to direct the transmit signal towards the convex surface of the non-plastic dielectric antenna body.

Abstract: A microwave transmission arrangement, comprising a microwave circuit board including a patch; microwave transceiver circuitry coupled to the patch; an electrically conductive hollow waveguide arranged to guide microwave signals between a first end and a second end; and a separator sheet sandwiched between the microwave circuit board and the first end of the hollow waveguide, the separator sheet being configured to allow passage of microwaves between the patch and the hollow waveguide through the separator sheet. The separator sheet is included in an encapsulation separating an encapsulated interior of the microwave transmission arrangement from an exterior outside the encapsulation, the patch, and the microwave transceiver circuitry being in the encapsulated interior, and the hollow waveguide being in the exterior outside the encapsulation.

Abstract: The present disclosure relates to a radar level gauge having a tank feed through structure with an elongated transmission member, wherein an inner surface of a dielectric sleeve is in abutment with, and encloses, a radially extending protrusion of the transmission member such as to conform with the shape of the radially extending protrusion. The present disclosure also relates to a method of manufacturing such a tank feed through structure.

Abstract: A waveguide for connecting measurement circuitry to an antenna in a radar level gauge, the waveguide comprising: a first tubular waveguide section having a female connecting portion, the first tubular waveguide section having a first abutment surface on an outer surface; a second tubular waveguide section having a male connecting portion arranged within the female connection portion so that the first and second waveguide portions are movable relative each other in an axial direction and to provide a continuous tubular passage through the waveguide, the second tubular waveguide section having a second abutment surface; and a spring arranged to abut against the first abutment surface and the second abutment surface.

Abstract: A guided wave radar level gauge adapted for mounting on a nozzle of a tank, including an attachment collar with an opening configured to be aligned with the nozzle and to be secured by means of an annular clamping device, and a transmission line probe attached to an exterior end of a probe connector. The GWR level gauge further comprises an annular sealing gasket fitted in the collar opening, the annular sealing gasket having a central opening through which the central probe connector extends, and a distancing sleeve arranged around the exterior end of the probe connector and having a radially protruding collar portion, wherein processing circuitry is configured to detect an impedance change caused by tank content or condensate which has passed through the central opening of the sealing gasket and collected in an annular space immediately surrounding the radially protruding collar portion.

Abstract: A valve arrangement for a guided wave radar level gauge including a valve housing holding a movable valve element having a through-opening, the movable valve element being configured to be movable between an open position and a closed position. A probe section arranged in the through-opening of the movable valve element. Upper and lower probe sections are located on respective sides of the movable valve element. A spring-loaded connection assembly is configured to form an electrical connection between the upper and the lower probe section via the probe section in the movable valve element when the movable valve element is in an open position.

Abstract: A radar level gauge system, comprising a transceiver; an antenna for radiating an electromagnetic transmit signal from the transceiver towards a surface of the product and for returning an electromagnetic reflection signal back towards the transceiver; a feed-through connecting the transceiver and the antenna; and processing circuitry coupled to the transceiver for determining the filling level based on a relation between the transmit signal and the reflection signal, wherein the feed-through comprises a waveguide arranged between the transceiver and the antenna to receive the transmit signal from the transceiver and guide the transmit signal towards the antenna in a guiding direction, the waveguide comprising an elongated plug arranged in a hollow conductor extending in the guiding direction, wherein the plug comprises a non-conductive sleeve member and a metallic plug member, the non-conductive sleeve member being sealingly joined to a portion of the hollow conductor and to the metallic plug member.

Abstract: A gauging instrument intended to be sealingly mounted on a nozzle of a tank, and comprising an attachment collar intended to mate with said nozzle so as to face the product in the tank, a dielectric filling member with a radially extending collar portion which abuts an outer rim of said attachment collar, and an annular spring element arranged between the outer rim the radially extending collar portion. One or several fastening elements are configured to secure the attachment collar to, and in mating relationship with, the nozzle, such that the radially extending collar portion is sandwiched between the outer rim of the attachment collar and the nozzle, and the annular spring element exerts a contact pressure on the collar portion against the nozzle to thereby ensure a process seal.

Abstract: A radar level gauge comprising a signal propagation device, a dielectric filling member arranged in the signal propagation device, and a sealing arrangement for preventing tank content from escaping into the outside environment, wherein the dielectric filling member comprises a main body and a sealing arrangement comprising a first sealing portion. The radar level gauge further comprises a structural reinforcement element positioned above the first sealing portion.

Abstract: A radar level gauge including a wave guiding structure and a cavity formed inside the wave guiding structure, and a dielectric filling member arranged at least partly within said cavity. The dielectric filling member includes a main body formed of a polymer material, at least one microwave absorbing element formed of a modified polymer material providing a microwave attenuation of at least 1 dB/centimeter at an operating frequency of the radar level gauge, the modified polymer material being obtained by modifying said polymer material with a filler material, wherein the at least one microwave absorbing element is integrally formed with said main body by sintering.

Abstract: A radar level gauge system comprising a transceiver; an elongated two-conductor probe having a signal conductor connected to the transceiver, and a rigid shielding conductor spaced apart from the signal conductor by an open space. The two-conductor probe extends from an upper probe end to a lower probe end; and processing circuitry for determining the filling level based on a transmit signal and a surface echo signal. The shielding conductor exhibits an open cross-section profile, in a cross-section with a plane perpendicular to the two-conductor probe, along at least a portion of the two-conductor probe. The two-conductor probe further comprises a plurality of spacer arrangements. Each spacer arrangement includes at least a first spacer member attached to the rigid shielding conductor and arranged between the signal conductor and the rigid shielding conductor for preventing contact between the signal conductor and the shielding conductor.

Abstract: A gauging instrument intended to be sealingly mounted on a nozzle of a tank, and comprising an attachment collar intended to mate with said nozzle so as to face the product in the tank, a dielectric filling member with a radially extending collar portion which abuts an outer rim of said attachment collar, and an annular spring element arranged between the outer rim the radially extending collar portion. One or several fastening elements are configured to secure the attachment collar to, and in mating relationship with, the nozzle, such that the radially extending collar portion is sandwiched between the outer rim of the attachment collar and the nozzle, and the annular spring element exerts a contact pressure on the collar portion against the nozzle to thereby ensure a process seal.

Abstract: A radar level gauge system comprising a transceiver; a probe for guiding a transmit signal towards a product in a tank, and for returning a surface echo signal; processing circuitry for determining the filling level based on the transmit signal and the surface echo signal; and a connection arrangement for conductively connecting the probe to the tank, and for providing the transmit signal from the transceiver to the probe. The connection arrangement comprises a feed-through member to which the probe is conductively connected. The feed-through member is in conductive contact with the tank at a grounding position, and a signal conductor extends through the feed-through member from the outside of the tank to the inside of the tank. A tank coupling arrangement is arranged on the inside of the tank to electrically connect the signal conductor and the metallic portion of the tank.

Abstract: A radar level gauge comprising a directional antenna, a hollow wave guide connected to the antenna, a tank connection having a through hole with an annular abutment, a dielectric filling member arranged in the tank connection, the dielectric filling member comprising an annular collar portion resting against the annular abutment, a clamping member inserted into the tank connection, a fastening member attached to the fixed tank connection to secure the clamping member between the fastening member and the annular abutment, and a spring member arranged between the fastening member and the clamping member. The spring member presses the clamping member towards the annular abutment, to apply a controlled pressure on the annular collar portion, allowing the annular collar portion to serve as a pressure tight sealing between a tank interior and a tank exterior.

Abstract: A radar level gauge system, comprising a transceiver; an antenna for radiating an electromagnetic transmit signal from the transceiver towards a surface of the product and for returning an electromagnetic reflection signal back towards the transceiver; a feed-through connecting the transceiver and the antenna; and processing circuitry coupled to the transceiver for determining the filling level based on a relation between the transmit signal and the reflection signal, wherein the feed-through comprises a waveguide arranged between the transceiver and the antenna to receive the transmit signal from the transceiver and guide the transmit signal towards the antenna in a guiding direction, the waveguide comprising an elongated plug arranged in a hollow conductor extending in the guiding direction, wherein the plug comprises a non-conductive sleeve member and a metallic plug member, the non-conductive sleeve member being sealingly joined to a portion of the hollow conductor and to the metallic plug member.

Abstract: The present invention relates to a field device adapted to determine a process parameter value related to a tank, the field device comprising a terminal block with: a first interface configured to connect to two wires of a loop; a first electrical conductor and a second electrical conductor for connecting the first interface with field device electronics, the second electrical conductor having a voltage drop generating element; a first power supply conductor connected to said second electrical conductor upstream of the voltage drop generating element and a second power supply conductor connected to said second electrical conductor downstream of the voltage drop generating element; and a second, auxiliary interface adapted for wired connection to an external device and configured at least for communication with said external device, wherein the second auxiliary interface comprises a communications connector which is galvanically isolated from the field device electronics.

Abstract: A radar level gauge including a wave guiding structure and a cavity formed inside the wave guiding structure, and a dielectric filling member arranged at least partly within said cavity. The dielectric filling member includes a main body formed of a polymer material, at least one microwave absorbing element formed of a modified polymer material providing a microwave attenuation of at least 1 dB/centimeter at an operating frequency of the radar level gauge, the modified polymer material being obtained by modifying said polymer material with a filler material, wherein the at least one microwave absorbing element is integrally formed with said main body by sintering.