ENDRESS+HAUSER  8F1B08-AADBAAASAAASA

• Measuring principle operates independently of physical fluid properties such as viscosity or density
• Highest measuring performance for liquids and gases under varying, demanding process conditions

• Mass flow: Measured error ±0.05 % (PremiumCal)
• Pressure rating of secondary containment up to 40 bar (580 psi)
• Nominal diameter: DN 8 to 250 (3⁄8 to 10")
• Robust, ultra-compact transmitter housing
• Highest degree of protection: IP69K
• Local display available

• Highest process safety – immune to fluctuating and harsh environments
• Fewer process measuring points – multivariable measurement (flow, density, temperature)
• Space‐saving installation – no inlet/outlet run needs
• Space‐saving transmitter – full functionality on smallest footprint
• Time‐saving local operation without additional software and hardware – integrated web server
• Integrated verification – Heartbeat TechnologyTM

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

The amplitude of the Coriolis force depends on the moving mass ∆m, its velocity ν in the system and thus on the mass flow. Instead of a constant rotational velocity ω, the 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:

• At zero flow (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).

The phase difference (A-B) increases with increasing mass flow. Electrodynamic sensors register the tube oscillations at the inlet and outlet. System balance is ensured by the antiphase oscillation of the two measuring tubes. The measuring principle operates independently of temperature, pressure, viscosity, conductivity and flow profile.