Siemens QBM3020-1U, S55720-S233

Air duct differential pressure sensor, -50…50 Pa

For use with air or nonaggressive gases, for extremely demanding accuracy and high requirements. With diaphragm sensing element.
Availabe with switchable pressure-linear or extracting-the-root characteristic and digital display. With extracting-the-root characteristic, the pressure measuring range is adjustable.

 Datasheet