Saab TankRadar Rex

Still-Pipe Gauge RTG 3940
The Still-Pipe Gauge RTG 3940 is used on tanks
with still-pipes and with all products suitable for
still-pipes such as crude oil, gasoline etc. It
transmits radar waves from a cone shaped antenna
towards the liquid surface inside the pipe. The stillpipe
can be mounted in a tank with an external or
internal floating roof or on a fixed roof tank.
To get custody transfer accuracy the gauge uses a
unique patented Low Loss Mode to transmit the
radar waves in the center of the pipe. This virtually
eliminates degradation of the accuracy due to rust
and product deposits inside the pipe. The Low Loss
Mode accuracy has been tested by custody transfer
authorities in rusty and deposit coated still-pipes.
The Still-Pipe Gauge can be mounted on existing
still-pipes. Standard antenna cones and flanges are
available for 5-, 6-, 8-, 10- and 12-inch pipes.The
flanges are made with or without pressure sealing.
The Waveguide Connection can be removed for
taking product samples or for hand dipping
through a Ø110 mm (4.33 inch) opening.
Installation is normally made without taking the
tank out of operation.
Pipe seen from above
H 11is
the normal radar
mode of a circular
waveguide.
Saab Low Loss Mode.
Very low losses from
rust or deposits.
Waveguide
Unit
Waveguide
Connection
RTG 3940 Still-Pipe Gauge
Weather
500 (19.7)
Protection
Hood
Transmitter
Head
TransitionCone
Seal
Saab TankRadar Rex
Stand
450 (17.7)
mm (inch)
Removable Wave-Guide Unit allows hand dips and sampling.
19