Oil & gas custody transfer is the most stringent density meter application — ±0.0005 to ±0.001 g/cm³ accuracy, OIML / API metrology certifications required, zero drift no more than 0.0005 g/cm³ over 12 months. This guide breaks it down by scenario.
Oil & Gas Custody Transfer Density Meter Selection Guide
Custody transfer is the most demanding density meter application — accuracy, certifications, and long-term stability all matter most here. This guide walks scenario-specific choices.
Steps
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Refined-product pipelines (gasoline / diesel)
Recommended PS7400 — OIML R117 certified version with PT100 temperature compensation, pressure compensation, 4-20mA + HART output. Installed downstream of the volumetric flow meter; mass flow auto-computed. -
Crude oil storage tanks (auto API gravity)
Recommended PS7300 differential pressure (tank-top or side-mount) — economical for large tanks (5,000~100,000 m³), 0.001 g/cm³ resolution sufficient, no radioactive-source burden. -
LPG custody transfer
Recommended PS7400 + Coriolis flow meter combo — LPG runs 1~2 MPa, density 0.5~0.6 g/cm³; PS7400 high-pressure version handles 4 MPa. -
Marine fuel HFO/VLSFO/MGO (BDN)
Recommended PS7400 + fuel heater (HFO at 50°C to reduce viscosity) + volumetric flow meter. Mass-based BDN auto-generated per ISO 8217. -
High-accuracy metering (frequent-dispute scenarios)
Recommended PS7210 bent-tube Coriolis — density accuracy ±0.0005 g/cm³, with mass flow and density together; single meter covers custody metering with zero parameter chain.