Vibration-principle density meters are the most common on industrial sites — both tuning fork and Coriolis recover density from vibration frequency. Same physical root doesn't mean equivalent fit — accuracy, price, installation, and medium tolerance differ markedly.
PS7400 Tuning Fork vs PS7210 Coriolis: Vibration-Principle Density Meter Comparison
Tuning fork and Coriolis are both vibration-based, but accuracy, installation, price, and applications differ substantially. This 7-dimension comparison helps you decide.
Steps
-
Measurement principle
PS7400 tuning fork (single / dual fork tine vibration, frequency varies with density); PS7210 Coriolis (U-shaped or triangular bent tube — fluid causes vibration phase shift through Coriolis effect, simultaneously giving density and mass flow). -
Accuracy class
PS7400 density ±0.001 g/cm³; PS7210 density ±0.001 g/cm³ + mass flow ±0.1%. PS7210 adds flow measurement. -
Installation
PS7400 insertion (flange / sanitary clamp / threaded); PS7210 inline (requires breaking the pipe to install in-series). PS7210 is more intrusive. -
Viscosity range
PS7400 ≤ 1000 cP; PS7210 ≤ 10000 cP; PS7220 straight tube ≤ 20000 cP. For high viscosity, choose PS7220. -
Solids tolerance
PS7400 solids ≤ 1%; PS7210 ≤ 1% (sensitive). Vibration principles not recommended for slurry / high-solids. -
Price tier
PS7400 < PS7210 < PS7220. At the same range, fork costs about 1/3~1/2 of Coriolis. -
Typical applications
PS7400: refined oil / fuel density, glycol concentration, sanitary Brix, LPG custody. PS7210: fine chemicals blending, biodiesel transesterification, injection-grade preparation, applications needing simultaneous mass flow metering.