VFP-..
Static differential pressure sensors
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Product information S4-VRP-M VAV • en • v2.0 • 11.2006 • Subject to changes
www.belimo.eu
Product features
Application
Together with a VRP-M controller and a Belimo NM..-ST actuator, the VFP-.. static pressure
sensors form a control system for pressure-independent variable (VAV) and constant (CAV) air
volume controls.
The pressure sensors are used for static differential pressure measurement with differential
pressure pickups installed in air ducts. They are also suitable for contaminated or slightly ag-
gressive air 1). Their robust design makes them ideal for installation in laboratories, clean room
systems and industrial applications.
Mode of operation
A high-quality metal diaphragm is used in the sensor. The measured pressure produces a corre-
sponding diaphragm stroke, which is detected inductively and converted to a pressure-linearised
output signal.
The measuring signal is influenced by the mounting position due to the dead weight of the dia-
phragm. The sensor is calibrated at the factory in the vertical position, but can be readjusted on
site if necessary, e.g. in order to mount it in another position.
The temperature is compensated to reduce drift to a minimum. The wear-free, inductive measu-
rement method guarantees maintenance-free operation.
1) See «Technical data», page 19
For zero offset and more information, see «System description», page 6
Electrical installation
The ready-to-connect sensor unit is connected to the VRP-M controller with the 4-pin plug.
