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Pressure measuring cell

  • US 20060243053A1
  • Filed: 09/15/2001
  • Published: 11/02/2006
  • Est. Priority Date: 10/19/2000
  • Status: Active Grant
First Claim
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1. A pressure measuring cell, having a base body (1, 23, 25);

  • a membrane (5, 27), connected to the base body (1, 23, 25), forming a measuring chamber (3, 29, 31), which in operation executes a deflection that is dependent on a pressure to be measured (p, p1-p2);

    a membrane bed, formed by a surface, oriented toward the membrane, of the base body (1, 23, 25), onto which bed at least one electrode (7, 33, 67) is applied, which together with a counter-electrode (9, 35, 69) applied to the membrane (5, 27) forms a capacitor, whose capacitance is a measure for the deflection of the membrane (5, 27); and

    a contact pin (13, 59, 71), passed through a bore (11, 57, 71) through the base body (1, 23, 25), by way of which pin the electrode (7, 33, 67) is electrically connected for measuring the capacitance, and which toward the membrane bed is soldered into the bore (11, 57, 71) with a solder (19, 57, 75), and the contact pin (13, 59, 73), the solder (19, 57, 75), and the membrane bed form a smooth surface.

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