Specialist for life sciences with an ultra-compact transmitter
- Measuring principle operates independently of physical fluid properties such as viscosity or density
- Designed for applications under sterile conditions in the life sciences industry
- ASME BPE, 3-A, EHEDG compliant & low delta-ferrite
- Electropolished measuring tube in 1.4435 (316L)
- Fast recovery from CIP/SIP
- Robust, ultra-compact transmitter housing
- Highest degree of protection: IP69K
- Local display available
- Highest process quality – fully compliant with industry requirements
- 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.
Fc = 2 · ∆m (ν · ω)
Fc = Coriolis force
∆m = moving mass
ω = rotational velocity
ν = radial velocity in rotating or oscillating system
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 (see illustration):
- If there is zero flow (i.e. when the fluid stands still), the oscillation measured at points A and B has the same phase (no phase difference).
- 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.
The device consists of a transmitter and a sensor. If a device with Modbus RS485 intrinsically safe is ordered, the Safety Barrier Promass 100 is part of the scope of supply and must be implemented to operate the device.
The device is available as a compact version:
The transmitter and sensor form a mechanical unit.