DIRECT ANSWER
What is the practical starting point?
Select a flowmeter by the required result—volume, mass, energy, batching, allocation or custody transfer—then match the technology to fluid phase and properties, flow range, pipe, pressure, temperature, installation and evidence requirements.
SELECTION FACTORS
Data to confirm before model selection
Use this list to prepare a traceable quotation request.
- 01Define the result: operating volume, standard volume, mass, energy, total or batch quantity.
- 02State liquid, gas, steam or multiphase service and provide composition, conductivity, density and viscosity where relevant.
- 03Describe solids, bubbles, wet gas, corrosiveness, coating and abrasion.
- 04Provide minimum, normal and maximum flow together with pressure, temperature and possible reverse flow.
- 05Record pipe size, schedule, material, orientation, full-pipe condition and available straight runs.
- 06Identify valves, bends, reducers, vibration, grounding, drainage, access and shutdown constraints.
- 07Specify pressure loss, output, power, communication, hazardous-area and calibration or metrology requirements.
TECHNOLOGY COMPARISON
Compare the decision factors
| Technology | Useful starting point | Primary boundary |
|---|---|---|
| Electromagnetic | Volume flow of electrically conductive liquids, including many solids-bearing liquids | Requires sufficient conductivity, compatible liner and electrodes, grounding and a full measuring tube |
| Coriolis | Direct mass flow and density for liquids or gases in a suitable size and range | Pressure loss, vibration, two-phase behavior, erosion and installation stress require review |
| Vortex | Clean liquid, gas or steam service within a usable velocity range | Reynolds number, vibration, two-phase flow, condensate and piping affect performance |
| Differential pressure | Liquid, gas or steam using a selected primary element | Pressure loss, rangeability, impulse lines, flow profile and compensation matter |
| Ultrasonic | Inline or clamp-on volume flow where the acoustic path is suitable | Fluid acoustics, bubbles or droplets, solids, pipe condition and flow profile can limit viability |
FAQ
Questions engineers ask first
Last reviewed:
Can a flowmeter be selected from pipe size and maximum flow?
No. The required result, minimum and normal flow, medium properties, operating envelope, installation and output requirements can change both technology and size.
Which flowmeter has the lowest maintenance?
Maintenance depends on the medium, installation and device. A meter with no moving parts can still require inspection for coating, abrasion, grounding, impulse-line condition or diagnostic changes.
What is different about custody-transfer selection?
The complete measurement system must meet the applicable standard or legal-metrology rules, including calibration or proving, compensation, computation and traceable records. A generic product-family statement is not enough.
ENGINEERING SUPPORT
Turn process data into a reviewable instrument request.
Share the medium, operating envelope, installation and required output. We will flag missing information before confirming a model.