Endress+Hauser: FLOWSIC900 Ultrasonic Flowmeter

May 21, 2025
FLOWSIC900: Custody Transfer Ultrasonic LNG Meter
FLOWSIC900 is the result of Endress+Hauser’s many years of experience in natural gas measurement: a flowmeter specially tailored to the requirements of the LNG industry. It offers the required custody transfer accuracy for volume flow measurement and meets highest metrological standards. With FLOWSIC900 and the proven products FLOWSIC600-XT and FLOWSIC100 Flare-XT, Endress+Hauser offer high-quality measurement solutions from a single source to bring measurement performance and reliability in LNG plants to a new level.
- Custody transfer measurement of LNG
- On and offshore applications
- Liquefaction, transport and storage of LNG
Device Properties:
- Intrinsically safe and reliable ultrasonic transducers
- Conform to OIML R117 Cl. 0.3 and API MPMS Ch. 5.8
- Real time measurement and diagnostics
- Full bore design without pressure drop or need for flow conditioner
- Factory thermal pre-insulation
- Remote Signal Processing Unit
FLOWSIC900 Benefits
- Low measurement uncertainty directly at custody transfer point reducing financial risks during LNG-transaction
- Increased transparency during LNG transaction by dynamic & real-time measurement & diagnostics
- Easy and fast access during commissioning and regular checks with remote SPU
- Operational expenditure savings by reduced boil-off gas losses and efficient LNG transfer due to minimized pressure drop
- Capital expenditure savings by simplified meter integration and installation due to compact design and factory pre-insulation
Specifications
- Measuring Principle: Ultrasonic transit time difference measurement
- Measured Variables: Volume a. c., volumetric flow a. c., Fluid velocity, Speed of sound
- Measuring Medium: LNG (Liquefied Natural Gas)
- Repeatability: ≤ ± 0.05 % of the measured value
- Accuracy: Typical error limits Qmin … Qmax ≤ ±0.2 % of reading after flow calibration and adjustment
- Operating Pressure Range: 0 bar (g) … 19 bar (g) / 0 psi(g) … 275 psi(g)
- Nominal Pipe Size: 8 ″ … 36 ″ DN200 … DN900, Schedule 40S/STD acc. ASME B36.19 / B36.10, others on request
- Digital Outputs: 2 Digital output/Frequency output – Others on request
- Digital Communication: Modbus RS-485 (2x), Modbus RTU/ASCII, Bluetooth, USB













