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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.

 

 

 

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Gas Ultrasonic Flow Meter Applications

 

 

 

 

 

 

Features

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

Applications

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

Specifications

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

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


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