US 11,747,177 B2
Pressure measuring device comprising an air passage provided at a plug connection
Robert Rimmele, Fronreute (DE); and Ruben Bentele, Tettnang (DE)
Assigned to IFM Electronic GmbH, Essen (DE)
Filed by IFM Electronic gmbH, Essen (DE)
Filed on Nov. 25, 2021, as Appl. No. 17/535,679.
Claims priority of application No. 102020131299 (DE), filed on Nov. 26, 2020.
Prior Publication US 2022/0163356 A1, May 26, 2022
Int. Cl. G01D 11/26 (2006.01); G01D 11/24 (2006.01)
CPC G01D 11/245 (2013.01) [G01D 11/26 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A pressure measuring device comprising a housing (2), a pressure measuring cell, evaluation electronics for processing the measurement signals generated by the pressure measuring cell, a plug connection (4) formed at the housing (2) for transmitting the processed measurement signals to an external receiving unit and an air passage (3) which permits pressure compensation between the interior of the housing and the exterior of the housing,
wherein the plug connection (4) comprises a cylindrical sleeve (4a) and an insert member (4b) disposed therein;
wherein the air passage (3) is formed as a two-part barrier comprising a first liquid barrier formed as a duct system (10) from the interior of the housing via the plug connection (4), and a second liquid barrier comprising a liquid-repellent diaphragm (20) and disposed in an area within the duct system (10);
and wherein the insert member (4b) comprises a first recess (A1) into which the diaphragm (20) is inserted;
wherein the insert member (4b) comprises a second recess (A2) which is disposed at a distance from the first recess (A1) and in which a light-emitting diode (30) is inserted, which signals a status of the measuring device (1);
wherein the cylindrical sleeve (4a) also comprises a recess (A3) at the side opposite the light-emitting diode (30), which recess (A3) on the one hand, acting as a part of the duct system (10) or air passage (3), allows the pressure compensation and, on the other hand, allows the light-emitting diode (30) to be visible.