Misura portata - Ventolina

The principle of measurement
is based on the fact that a vane wheel rotates at a speed proportional to the flow velocity v of a fluid into which it is immersed. The rotational speed is almost independent of density, pressure and
temperature of the medium.
The sensing of the vane wheel rotation is carried out by an inductive proximity switch from BAGGI. By fitting a further inductive proximity switch, sensing of the direction of the vane wheel rotation and the indication of the ±direction of flow is made possible.
This form of control of rotational speed is carried out without the slightest braking effect on the vane wheel. Soilage does not effect the impulse recognition. The light weight of the vane wheel - approx.
0.3...0.7 g depending on the type - makes it most suitable for adapting its rotational speed in millisecond range to intervening velocity changes.
All vane wheel flow sensors are calibrated on the same frequency, so that sensors of the same type are interchangeable

Types of sensor with vane wheel
  •  v-sensors for measuring the flow velocity v
  • vt-sensors for measuring the flow velocity v and also the temperature t
  •  v-sensors for sensing the ±direction of flow
  • v-sensors also in protective system EEx ib IIC T6

Vane wheel material
As a rule a vane wheel is made of the same material as that referred to in the sensor identification.
Should another material be used for the vane wheel then this material will be referred to separately in the sensor identification. The vane wheels in BAGGI vane wheel
flow sensors are pivot suspended.
The materials used for vane wheel axes and jewel bearings guarantee highest quality with regard to fatigue strength for infinite time, temperature stability and corrosion resistance.
Axes: sintered hard metal Stones: synthetic sapphire