ENDRESS+HAUSER  83E50-AAASAAAAAAAA

• Measuring principle operates independently of physical fluid properties such as viscosity or density
• Highly accurate measurement of liquids and gases for a wide range of standard applications

• Compact dual-tube system
• Medium temperature up to +140 °C (+284 °F)
• Process pressure: up to 100 bar (1450 psi)
• Device in compact or remote version

• 4-line backlit display with touch control
• HART,PROFIBUS PA/DP, Modbus RS485, FF, EtherNet/IP

• Cost-effective – multi-purpose device; an alternative to conventional volumetric flowmeters
• Fewer process measuring points – multivariable measurement (flow, density, temperature)
• Space-saving installation – no in/outlet run needs

• Quality – software for filling & dosing, density & concentration, advanced diagnostics
• Flexible data transfer options – numerous communication types
• Automatic recovery of data for servicing

The measuring principle is based on the controlled generation of Coriolis forces. These forces are always present when both translational and rotational movements are superimposed.

The amplitude of the Coriolis force depends on the moving mass Am, its velocity v in the system, and thus on the mass flow. Instead of a constant angular velocity w, the Promass sensor uses oscillation. In the sensor, two parallel measuring tubes containing flowing fluid oscillate in antiphase, acting like a tuning fork. The Coriolis forces produced at the measuring tubes cause a phase shift in the tube oscillations (see illustration):

• At zero flow, in other words when the fluid is at a standstill, the two tubes oscillate in phase (1).
• Mass flow causes deceleration of the oscillation at the inlet of the tubes (2) and acceleration at the outlet (3)