公开(公告)号：EP3617666A3

公开(公告)日：2020-05-27

申请号：EP19176251.7

申请日：2019-05-23

申请人： Sensata Technologies, Inc.

发明人： TADAS, Harshad V. ,  HANNA, Tyler S. ,  LAL, Nikhil B. ,  LEGENDRE, Andrew

IPC分类号： G01F23/26

摘要： According to one embodiment, a fluid level sensor apparatus for directly inserting into an oil-based fluid is disclosed. The apparatus comprises a sense element that includes a plurality of electrodes mounted on one side of a substrate. In this embodiment, the plurality of electrodes form at least two inter-digitated planar capacitors in which a capacitance of one of the inter-digitated planar capacitors varies as a function of the level of the oil-based fluid within a fluid cavity. The apparatus in this embodiment also includes a passivation layer covering the two inter-digitated planar capacitors and an oleophobic coating covering the glass barrier layer.

公开(公告)号：EP3617666A2

公开(公告)日：2020-03-04

申请号：EP19176251.7

申请日：2019-05-23

申请人： Sensata Technologies, Inc.

发明人： TADAS, Harshad V. ,  HANNA, Tyler S. ,  LAL, Nikhil B. ,  LEGENDRE, Andrew

IPC分类号： G01F23/26

摘要： According to one embodiment, a fluid level sensor apparatus for directly inserting into an oil-based fluid is disclosed. The apparatus comprises a sense element that includes a plurality of electrodes mounted on one side of a substrate. In this embodiment, the plurality of electrodes form at least two inter-digitated planar capacitors in which a capacitance of one of the inter-digitated planar capacitors varies as a function of the level of the oil-based fluid within a fluid cavity. The apparatus in this embodiment also includes a passivation layer covering the two inter-digitated planar capacitors and an oleophobic coating covering the glass barrier layer.

公开(公告)号：EP3599447A1

公开(公告)日：2020-01-29

申请号：EP19176159.2

申请日：2019-05-23

申请人： Sensata Technologies, Inc.

发明人： HANNA, Tyler S. ,  TADAS, Harshad V. ,  LEGENDRE, Andrew ,  GUBANOV, Nikita

IPC分类号： G01F23/00 ,  G01F23/04 ,  G01F23/26

摘要： A dielectric-constant-insensitive fluid level sensor for directly inserting into a high dielectric constant fluid is disclosed. According to one embodiment, the fluid level sensor includes a first set of stacked series capacitors where each capacitor in the first set is formed by two coplanar electrodes and a dielectric space between the electrodes. Each stack of series capacitors in the first set includes at least one capacitor having a first molded carrier as the dielectric space in series with another capacitor having a first fluid cavity as the dielectric space. In this embodiment, the total capacitance of the first set of stacked series capacitors varies as a function of the level of the fluid within the first fluid cavity.