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Sentinel - Custody Transfer Gas Ultrasonic Flow Meter

Sentinel Custody Transfer Flow Meter

Sentinel custody transfer gas ultrasonic flow meter is a two-path flow meter designed for natural gas applications such as transmission and distribution, pipeline balancing, compressor station metering or when high accuracy is required.

 

 

 

Gas Ultrasonic Flow Meter Applications

 

 

 

 

 

 

  • Compliant to AGA9, with accuracy < 0.1%
  • Least complicated path configuration
  • 70:1 turndown
  • No moving parts and no filters or strainers

The Sentinel fl owmeter is a complete ultrasonic fl owmeter system for the measurement of natural gas fl ow applications such as:

  • Custody transfer
  • Transmission and distribution
  • Underground storage
  • Pipeline balancing
  • Power systems
  • Gas processing
  • Compressor station metering
  • Gas production
  • Fuel monitoring

Operation and Performance

Meter is designed to meet or exceed the requirements of AGA Report Number 9.

Fluid Types Natural gas (other gases available upon request)
Pipe Sizes 4 in to 24 in (100 mm to 600 mm)
Other sizes available upon request.
Meter Body Materials Carbon steel (A106 Gr. B or A333 Gr. 6) pipe section with carbon steel (A105 or A350 LF2) fl anges and fittings
Specify A333 Gr. 6 and A350 LF2 for low-temperature service.
Maximum Error (Without Flow Calibration) ±0.5% between 0.1 Qmaximum* and Qmaximum
±1.0% between Qminimum and 0.1 Qmaximum*
Repeatability 0.08% between 0.1 Qmaximum* and Qmaximum
0.15% between Qminimum and 0.1 Qmaximum*
Resolution 0.003 ft/s (0.001 m/s)
Velocity Sampling Interval 0.2 seconds
Maximum Peak-to-Peak Error ±0.2% between 0.1 Qmaximum* and Qmaximum
*(0.15 Qmaximum for 4” meter size)
Zero Flow Reading

<0.007 ft/s (.00213 m/s) for each acoustic path
<0.01 ft/s (.00305 m/s) composite for all paths

Accuracy can be improved with high pressure NG flow calibration.
Meter Performance Flow calibrated accuracy is 0.1% of reading relative to lab
Absolute accuracy is 0.3% including lab uncertainty

Specifi cations assume 5 diameters upstream and 5 diameters downstream of straight pipe run in addition to the pipe run and fl ow conditioning plates provided with the Sentinel system, and a flow velocity greater than 5 ft/s (1.5 m/s).
For Pipe Sizes 4 in to 10 in (15 cm to 25 cm) Maximum actual measurable velocity: ±118 ft/s (±36 m/s)
Minimum actual measurable velocity: ±2.4 ft/s (±0.72 m/s)
Transitional fl ow velocity: 11.8 ft/s (3.6 m/s); QT = 10% (QT = 15% for 4” meter size)
For Pipe Sizes 12 in to 24 in (30 cm to 61 cm) Maximum actual measurable velocity: ±88.6 ft/s (±27 m/s)
Minimum actual measurable velocity: ±1.48 ft/s (±0.45 m/s)
Transitional fl ow velocity: 8.86 ft/s (2.7 m/s); QT = 10%



Maximum operating gas pressure @ 176°F (80°C)

ANSI Flange Class
300 lb600 lb900 lb
MAOP psig (bar) 690 psig 1381 psig 2072 psig
(47 bar) (95 bar) (143 bar)

 

Electronics

Flow Measurement Correlation Transit-Time mode
Enclosures

US: Epoxy-coated aluminum
Weatherproof Type 4, IP66
Class I, Division. 1, Groups B,C&D
FM and CSA

European: Flameproof
II 2 GD EEx d IIC

Dimensions Main enclosure
Weight: 10 lb (4.5 kg),
Size (h x d): 8.2 x 6.6 in (208 x 168 mm) 
Power Enclosure Weight: 25 lb (11.3 kg),
Size (l x h x d): 15 in x 10 in x 8 in (381 mm x 254 mm x 203 mm)
Display 2-line x 16-character LCD display, LED backlight, configurable to display up to four measurement parameters in sequence
Power Supplies Standard: 95 to 240 VAC ±10%, 50 to 60 Hz ±2%
Optional 17 to 32 VDC, ±10%
Power Consumption 20W maximum
Operating Temperature –40°C to 60°C (–40°F to 140°F)
Storage Temperature –55°C to 75°C (–67°F to 167°F)
Standard Inputs/Outputs Two 0/4 to 20 mA isolated outputs, 600 W maximum load
One frequency (HF) output, optically isolated, from DC to 10 kHz maximum
One hermetically sealed Form C alarm relay. Can be applied to indicate fl ow direction or fault.
Two isolated 4 to 20 mA inputs and 24 V loop power for pressure and temperature
Optional 2 HF outputs and two alarm output or 1 HF output and 4 to 20 mA inputs
Digital Interfaces Bidirectional RS232 or RS485 link to PanaView Software
RS485 Modbus® digital output
Audit Capacity Password security protected
Log fi le of all critical parameters not erasable
Totalizer hardware secured/seal
European Compliance System complies with 73/23/EEC LVD (Installation Category II, Pollution Degree 2), PED Cat III, Module H

Descriptions Chinese English Italiano Português Russsian Español
PanaView for Sentinel Operating Manual PanaView for Sentinel Operating Manual
Sentinel - Panametrics Custody Transfer Gas Ultrasonic Flowmeter Sentinel - Panametrics Custody Transfer Gas Ultrasonic Flowmeter Sentinel - Panametrics Custody Transfer Gas Ultrasonic Flowmeter Sentinel - Panametrics Custody Transfer Gas Ultrasonic Flowmeter Sentinel - Panametrics Custody Transfer Gas Ultrasonic Flowmeter Sentinel - Panametrics Custody Transfer Gas Ultrasonic Flowmeter Sentinel - Panametrics Custody Transfer Gas Ultrasonic Flowmeter
Sentinel Operating Manual Sentinel Operating Manual
Sentinel Setup & Calibration Guide/ Reference guide Sentinel Setup & Calibration Guide/ Reference guide


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