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The FLUXUS H731 from Flexim, part of Emerson’s advanced measurement portfolio, is a state-of-the-art ultrasonic flow and analytical solution tailored for the hydrocarbon processing industry (HPI). Utilizing a non-invasive clamp-on design, this meter delivers high-precision flow and acoustic velocity readings without disrupting the process flow.

What sets the H731 apart is its integrated HPI-specific computation capabilities. It calculates critical parameters such as API gravity, operating density, base-condition density, and kinematic viscosity directly within the device. Flow measurements are automatically adjusted for pressure and temperature based on established industry norms, including ASTM1250, GPA TP25, D4311, and ISO 91. This ensures that standard volume flow of liquid hydrocarbons is measured with both accuracy and consistency in real time.

The FLUXUS H731 provides an ideal solution for complex hydrocarbon applications, delivering reliable data without compromising pipeline integrity.

Ultrasonic Clamp-On Flow Meter Rentals

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Flexim FLUXUS H731 Non-intrusive Ultrasonic Flow Meter for Hydrocarbons

Specs

Fluid type
Various hydrocarbons
Accuracy
Measurement uncertainty of the measuring system (volumetric flow rate): ±0.3 % of reading ±0,005 m/s (±0.02 ft/s)
Measurement uncertainty at the measuring point (volumetric flow rate): ±1 % of reading ±0,005 m/s (±0.02 ft/s)
Repeatability
0.15 % of reading ±0,005 m/s (±0.02 ft/s)
Flow Channels
up to 2
Range
Flow Velocity Range: 0,01 to 25 m/s (0.03 to 82 ft/s), depending on pipe diameter
Certifications/Approvals
FM Class I /Div 2
ATEX/IECEx Zone 2
Power supply
90-264VAC
11-32VDC
Pipe size
6 to 6500 mm (0.24 to 255.9 inch)
Pressure range
-
Temperature range (media)
-40 to +240°C ('-40 to +464°F) / WI: -200 to +630°C (-328 to +1166°F)
Output
4-20mA active/passive
4-20mA HART® active/passive
pulse/frequency/binary
Input
Temperature
4-20mA active/passive
Communication Protocol
Modbus RTU/TCP
BACnet MSTP/IP
Profibus PA
FOUNDATION Fieldbus
M-Bus

Features

  • Advanced flow and analytics - automatic fluid identification and interface detection.
  • Standard volume flow compensation - pressure & temperature inputs.
  • Superior temperature stability - zero drift. Temperature compensated transducers.
  • Robust - "fit for purpose" durable mounting fixtures and ATEX/IECEx Zone 2, FM Class I Division 2 transducers.
  • High turndown range - capability of measuring at very low flow rates.
  • Bi-directional flow metering.
  • Advanced Meter Verification.
  • ISO 24062 compliant.
  • Flow disturbance correction to reduce required straight runs down to 2D inlet.