The Rosemount 3051SFA ProBar differential pressure flow meter incorporates the exceptional performance of the Rosemount 485 Annubar primary element with the Rosemount 3051S pressure transmitter, producing a reliable, cost-effective flow measuring device that performs extraordinarily well in a variety of applications.

Differential pressure flow meters utilize a primary element that senses impact pressure and reference pressure through sensing ports and averages them to obtain a flow measurement. The 3051SFA is particularly effective with clean liquids, delivering ±0.75% accuracy for liquids and ±1.4% for gas and steam with 8:1 flow turndown.

By integrating pressure transmitter electronics with the primary element, the ProBar is a fully integrated flow meter that performs to the highest standards while providing installation flexibility, reducing costs and saving time. The 10-year 'set and forget' electronics ensure long-term reliability with minimal maintenance.

The 485 Annubar primary element features a revolutionary T-shaped sensor with a sealed, pressure-retaining thermowell that permits mass flow in all line sizes with a single pipe penetration. The 285 Annubar is also available for general purpose applications with ±1.0% accuracy in a duct mount version. Both designs increase signal strength and reduce signal noise for tight process control.