High Precision Inventory Tank Gauging System

Technical DescriptionRadar Tank GaugesThere are five types of RTG 3900 Series Radar TankGauges to fit any storage tank:• Horn Antenna Gauge, RTG 3920, for fixed roofinstallation without still pipe.• Parabolic Antenna Gauge, RTG 3930, forinstallation without still pipe, for general use andin demanding environments.• Still Pipe Gauge, RTG 3940, for measurement inexisting still pipes.• Still Pipe Gauge, RTG 3945, for measuring in stillpipes in pressurized tanks (other than liquefiedgas tanks).• LPG/LNG Gauge, RTG 3960, for liquiefied gas,LPG and LNG.The RTG 3900 Transmitter Head with different antennas.The Radar Tank Gauge (RTG) measures thedistance to the surface of the product in the tank.Using tank distances stored locally in the memoryof the gauge, it calculates the level of the liquid’ssurface. The level is communicated on the digitalTRL/2 field bus to the Field Communication Unitsand to the PC workstations or other host computers.Transmitter HeadThe radar gauges are built up by the TransmitterHead (TH) and the antenna. The same TransmitterHead is used on all types of Rex tank gaugesminimizing spare parts requirements. It is freelyinterchangeable between different gauges,regardless of antenna type. The Transmitter Headweight is only 8 kg (18 lbs).The enclosure of the Transmitter Head is a ruggedair and watertight protection against salt sprayatmosphere in coastal areas.Transmitter Head ElectronicsThe Transmitter Head Electronics (THE) is aseparate unit located inside the safety enclosure ofthe Transmitter Head. It is easily exchangeable andnot in contact with the tank atmosphere. The THEincludes the microwave unit, circuit boards forsignal processing, data communication, powersupply and transient protection.Transmitter Head with optional junction box for deliveries according toCENELEC standards.12