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Saab TankRadar Rex is a state-of-the-art inventory and custody transfer radar tank gauging system for storage tanks. It fulfills the highest requirements on performance and safety. The development of Saab TankRadar Rex is based on 25 years experience in radar level gauging. More than 50,000 radar gauges have been delivered by Saab Rosemount.
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The Saab TankRadar Rex System can be used at bulk liquid storage tanks at refineries, independent tank terminals, marketing terminals, pipeline terminals, petrochemical industry, liquified gas terminals, and aviation fuel deposits. The extensive range of TankRadar Rex RTG 3900 Series level gauges fits all types of tanks, fixed or floating roofs, pressurized or non-pressurized. The Saab TankRadar Rex system measures the entire storage tank site. The system software can also make accurate measurement and calculation of liquid levels, temperature and water interface level, hydrostatic and vapour pressure, and observed density, and TOV, GOV, GSV and NSV. With a lean and clean installation, the Saab TankRadar Rex System offers also flexible field communication via many protocols eg, Profibus, Tiway, TRL/2. Intelligent gauge emulation compatible with all major tank gauging systems is also available. 
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Instrument accuracy: ± 0.5 mm (± 5/256 inch).
Maximum instrument deviation: ± 0.8 mm (± 1/32 inch).
Ambient operating temperature: -40 °C to +70 °C (-40 °F to +158 °F).
Hazardous locations certifications: II 1/2 G EEx d[ia] IIB T6 (T amb -40 °C to +70 °C) according to ATEX directive (EN 50014, EN 50018, EN 50020, EN 50284 Europe ) and Class 1, Div 1, Groups C and D according to UL (UL 1203, UL 913 and UL 508) for USA .
See also Saab TankRadar Rex Technical Description. Ingress protection: IP 66 & 67.
Housing material: Anodized aluminium.
Power supply: 100-240 VAC, 34-70 VAC (option), 20-28 VDC (option), 48-99 VDC (option).
Analog outputs: One output, 4-20 mA passive or active (non-intrinsically safe)
Analog inputs: alt 1) One or two 4-20 mA alt 2) One 4-20 mA input plus one digital HART input (the RTG is HART master. Each RTG can have maximum 3 HART slaves).
Relay outputs: Max 2 relays, only one output available if analog outputs are included.
Field bus (standard): TRL/2 Bus.
Field bus (options):
- Profibus ® DP.
- Tiway ® (only one relay available, analog output not available).
- FOUNDATION ™ fieldbus (non-IS: only one relay available, analog output not available. IS: only one analog input available).
Other vendors’ communication protocols:
- Enraf ® (requires special Field Bus Modem, EBM).
- Varec ® (only one relay available, analog output not available).
- L&J ® (only one relay available, analog output not available)
- Whessoe ® (only one relay available, analog output not available)
- GPE ® (only one relay available, analog output not available)
- Sakura ® (only one relay available, analog output not available)
Temperature inputs: Up to 6 temperature inputs (PT 100) with common return or 3 with individual wiring directly into the gauge. Up to 14 temperature inputs to each gauge via separate Data Acqusition Unit (DAU).
Temperature conversion accuracy: ± 0.1 °C for -50 °C to +250 °C (-58 °F to +482 °F).
Note! Temperature range for PTB approval is - 20 °C to +90 °C (-4 °F to +194 °F).
Total weight for transmitter head without flange: 12 kg (26 lbs).
Field data display: In separate DAU or RDU.
Antennas: All antennas are of drip-off type in accordance with API ( Ch. 3.1 B, Ed 1). For antenna specific data, see Technical Data for the different gauges (choose component).
For further information, see Saab TankRadar Rex Technical Description. |
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PRODUCTS
Saab TankRadar Pro Gauge Series
RTG 3920 Horn Antenna Gauge
The Horn Antenna Gauge is designed for easy mounting in small size openings on tanks with fixed roof. It can be mounted in a nozzle with a diameter of 8" (200mm) or larger.
Instrument Accuracy |
± 0.5mm (1/32”) |
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Operating temp. in tank |
Max. +230 °C |
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Measuring range |
0.85 to 20m (2.7 to 65 ft.)below flange |
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Pressure |
-0.2 to 2bar (-3 to 30 PSI) |
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Total weight |
Approx. 20kg (44 lbs.) |
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Material exposed to tank atmosphere |
Acid proof steel (type316), PTFE(Teflon) and FPM(Viton) |
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Nozzle diameter |
Min. 8”(200mm) |
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RTG 3930 Horn Antenna Gauge
The RTG 3930 gauge is designed for mounting on tanks with fixed roofs. It measures levels of products ranging from clean products to very difficult ones like bitumen/asphalt.
The Parabolic Antenna Gauge can also be used on tanks with floating roofs. The RTG is mounted at the tank top and measures the distance down to a target plate on the floating roof.
Instrument Accuracy |
± 0.5mm (1/32”) |
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Operating temp. in tank |
Max. +230 °C |
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Measuring range |
0.8 to 40 m(2.7 to 131 ft.)below flange |
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Pressure |
-0.2 to 0.2 bar (-3 to 3 PSI) option up to 10 bars (145 PSI) |
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Total weight |
Approx. 25kg (55 lbs.) |
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Material exposed to tank atmosphere |
Acid proof steel (type 316), PTFE(Teflon) |
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Nozzle diameter |
Min. 20" |
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RTG 3950 Still-Pipe Array Antenna Gauge
2 versions available:
- Inclined
- Fixed
RTG 3950 with its small-sized array antenna is made for mounting on existing still-pipes. Typical applications are crude oil tanks with floating roofs and gasoline/product tanks with or without inner floating tanks.
There are two versions of RTG 3950; fixed and inclined. The inclined version has a hinged hatch, enabling full pipe size product sampling or verification hand-dips.
Instrument Accuracy |
± 0.5mm (1/32”) |
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Operating temp. in tank |
Max. -40 °C to +120 °C |
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Measuring range |
0.8 to 40 m(2.7 to 131 ft.) from antenna end |
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Pressure |
Fixed version: 2 bar (29 psig) at 20 °C Incline version: 5 to 8 inch pipes, 0.5 bar, 10 and 12 inch pipes, 0.25 bar (3.6psig) |
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Total weight |
21.5-32kg for fixed version, 28.5-41.5kg for inclined version |
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Material exposed to tank atmosphere |
Antenna: PPS
Sealing: PTFE(Teflon)
O-ring: Fluorosilicone
Flange: Acid proof steel (type 316) |
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Still-pipe dimensions |
5-, 6-, 8-, 10-, or 12-inch |
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RTG 3960 LPG/LNG Gauge
The RTG 3960 gauge is designed for level measurement of liquefied gas in LPG or LNG tanks with still-pipes. The still-pipes enable the gauge to have a sufficiently strong echo even under surface boiling conditions.
Instrument Accuracy |
± 0.5mm (1/32") |
Operating temp. in tank |
-55 °C to 90 °C (-67 °F to 194 °F) |
Measuring range |
0.5 to 60 m (1.6 to 200 ft.) from cone end |
Pressure |
Up to 25 bar (365 PSI) |
| Pressure sensor |
Druck PTX 621 |
| Flange |
6" |
| Still pipe dimension |
4" Sch. 10 or sch. 40 100 mm (99 mm inner diameter) |
Total weight |
6" 150 PSI - appr. 38 kg (84 lbs)
6" 300 PSI - appr. 48 kg (106lbs) |
Material exposed to tank atmosphere |
Antenna: Acid proof steel (type 316) and quartz
Sealing: Quartz |
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FCU 2165/2175 Field Communication Unit (FCU)
The Field Communication Unit (FCU) is a data concentrator that continuously polls data from field devices such as radar and servo tank gauges from different vendors, data acquisition units, I/O Modules, other FCU:s, Enraf ® CIU:s and hosts / DCS systems such as Enraf ® Entis, Yokogawa ®, ABB ®, Honeywell ®, Foxboro ®, etc.
Explosion protection |
None |
Ambient operating temperature |
-40 °C to +70 °C (-40 °F to +158 °F) |
Power supply |
115 or 230 VAC, +10% to -15%, 50-60 Hz |
Power Consumption |
25 W (FCU 2165), 60 W (FCU 2175 |
| Ingress protection |
IP 65 (FCU 2165), IP 21 (FCU 2175) |
| Field bus / Host ports |
TRL/2 Bus, Enraf BPM, Whessoe Current Loop , RS232, RS422, RS485 |
| Bus baudrate |
Programmable up to 38400 |
Total number of RTG:s and Independent DAU:s per field bus port |
Host dependant |
Number of tanks per FCU |
Host dependant 8 |
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Lite, Standard, Gold and Platinum Transmitter Head versions
TankRadar ® PRO is used for reliable level and volume measurement in refineries and tank terminals, where the demands on the accuracy of measurements are not so stringent.
The TankRadar Pro gauge is available in four versions for various requirements:
Lite
For non-hazardous area tanks without internal structures and agitators, such as storage tanks. Accuracy is ± 10 mm.
Standard
Suitable for most tanks even if there are echo-disturbing internal structures such as agitators or baffles. Accuracy is ± 10 mm.
Gold
For difficult applications in tanks or vessels where there might be multiple agitators, heating coils, beams or other sources of false echoes and where high accuracy and resolution is required. Accuracy is ± 5 mm.
Platinum
Platinum is the TankRadar Pro version with the highest accuracy, of ± 3 mm. It includes the FHAST™ software and selected hardware for maximum performance.
Operating principle |
10 GHz FMCW-radar |
Instrument accuracy |
±3 mm (±0.12 in.), ±5 mm (±0.2 in.) or ±10 mm (±0.4 in.) depending on model |
Power supply |
Ultra wide 24-240 V DC or AC 0-60 Hz |
Display/configuration |
Local display, remote display, RadarMaster PC software |
| Primary output |
Saab TRL/2 bus (FSK with Modbus protocol) or Profibus ® DP, analog 4-20 mA, active or passive + digital HART ® , F OUNDATION ™ fieldbus |
| Secondary output |
Analog 4-20 mA current loop, active or passive |
| Temperature measurement |
Up to 6 spot elements per tank with common return, PT100 via display unit |
Antennas |
Cone, parabolic, process seal and still-pipe cone |
Antenna materials wetted parts |
Stainless steel SS 316L, PTFE, Quartz, Viton, Kalrez |
| Tank temperature |
-40 to 400 ºC (-40 to 752 ºF) |
| Ambient temp. |
-40 to 70 ºC (-40 to 158 ºF) |
| Measuring range |
0-50 m (0-165 ft) default, 0-99 m (0-325 ft) special configuration |
| Ex approval |
ATEX/CENELEC: II I/2G / EEx de [ib/ia] IIC T6
FM: Explosion proof Class I, Div. 1 & 2, Groups A, B, C and D.
CSA: EEx de IIC T6. FTZU: EEx de ib IIC T6.
GOST: EEx de ib [ia/ib] IIC T4. |
| Weight |
8 kg (18 lbs.) |
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Application Sheet, Asphalt
Brochure, Emulation - Hook up New Performance to Your Old System
Brochure, Hydrostatic to Hybrid Tank Gauging, Rex
Brochure, Rex - All Radar Gauges are not TankRadar
Brochure, Tank Intelligence
Commissioning Manual, Rex
Display Unit RDU 40 User´s Guide (for Rex)
Installation Manual, Rex
Product Sheet, Emulation Enraf
Product Sheet, Emulation GPE
Product Sheet, Emulation L&J
Product Sheet, Emulation Sakura
Product Sheet, Emulation Varec
Product Sheet, Emulation Whessoe
Product Sheet, Overfill Protection (TÜV)
Product Sheet, Reliable Leakage Detection
Product Sheet, RTG 3900 L Series
Product Sheet, Saab Rosemount Tank Gauging System with Foundation™ fieldbus
Product Sheet, System Overview
Reference Manual, Rex with Foundation fieldbus
Service Manual, Rex
Special Safety Instruction, Saab TankRadar Rex
Technical Description, Rex
Technical Note, Extended Waveguide, RTG 3960
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