Patent ID: 6269693
Filing Date: 2001-08-07
Classification: G01F,G01N

Abstract:
A capacitive sensor for measuring a characteristic of a fluid forming a dielectric between sensor capacitor plates, said capacitive sensor comprising a bent circuit board (BCB) having at least two plane sections (PS) and at least one flexible bent section (1.9) interconnecting said plane sections (PS) to form said bent circuit board (BCB) with at least one U-sectional configuration, metal coatings on said plane sections forming said capacitor plates (1.2, 1.3) facing each other across a fixed spacing to form a sensing capacitor (C1), spacer means (3) between said plane sections (PS) of said bent circuit board for maintaining said fixed spacing at a dimensionally stable thickness between said capacitor plates (1.2, 1.3), and flow port means in said sensor for said fluid to enter into said space between said capacitor plates and for venting said space.