The DP5-R works on the force balance principle and
consists of two main units: The measuring unit which
detects the pressure variation and consists of two
forged bodies and a bellows. The transmission unit
converts the differential force applied to the measuring
element into a proportional output pneumatic signal.
The output pressure, generated by a flapper nozzle
relay, feeds the feedback bellows with a rising pressure
until the balance between bellows force and measuring
element is reached. The whole transmission unit is
contained within a water-resistant housing.

For models and options see PDF documentation below.

* Zoekterm: pneumatische, pneumatic, transmitters, OMC