By measurement principle
Differential Pressure Density Meter
hydrostatic density meter · DP density meter · pressure differential density meter
Differential pressure across a known column height (PS7300) — ρ = ΔP / (g·H). Pure physical measurement, no moving parts, ≤ ±0.2%/12 months drift. Three installation styles (straight insert / bent insert / side-mount) cover tank-top, in-tank and tank-wall layouts.
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