FH Sonic Ultrasonic Flowmeter
Faure Herman's newest meter (2025): an inline multi-chord ultrasonic flowmeter for custody transfer of liquids, with MID Class 0.3 and OIML R117 approvals, negligible pressure drop and transducers that can be replaced without draining the pipe.
Supplied and supported in Singapore by Ronsor Engineering · +65 6779 2818 · Not sure it's the right one? Try the Product Finder
The FH Sonic is Faure Herman's newest flowmeter, launched in 2025 for custody transfer of liquids. It is a complete inline metering spool. Ultrasonic transducers measure the flow across five chords, arranged asymmetrically to correct for a distorted flow profile, and up to ten chords are available. With no moving parts or obstruction in the bore, the pressure drop is negligible, which lowers pumping energy and running costs over the meter's life.
The transducers can be removed while the line is in service, so maintenance doesn't require draining the pipe. Built-in diagnostics report measurement quality, such as gas at the top or solids at the bottom of the pipe and changes in the speed of sound.
Typical uses
- Custody transfer and fiscal metering of crude oil and refined products
- Pipeline, terminal and marine loading and unloading
- Transfers in and out of tank storage
Key specifications
- Fluids: liquids, viscosity 0.2 to 500 cSt, density 400 to 1,500 kg/m³
- Sizes: DN 100 to DN 600 (4" to 24"), others on request; flanges ANSI 150 / 300 / 600 / 900
- Custody transfer velocity range 0.5 to 12 m/s; turndown 24:1
- Linearity ±0.15%; repeatability to API MPMS Chapter 5.8 (Table B1); can be proved with a compact prover (conditions apply)
- Metrology: OIML R117-1, MID Class 0.3
- Process temperature -50 to +115°C; ambient -45 to +65°C
- Body and flanges in carbon steel or stainless steel; transducers in stainless steel and PEEK
- Outputs: 2 pulse, 2 analog (4-20 mA, optional HART), 4 digital; RS485, RS422 and Ethernet with Modbus RTU / TCP; 24 Vdc
- ATEX II 2 G (Ex d mb IIB T4), IP66, PED and EMC compliant
