Patent ID: 7207219
Filing Date: 2007-04-24
Classification: G01F,G01N

Abstract:
1. Rod-shaped element, which is essentially cylindrical and comprises a first end as well as a second end, whereby the rod-shaped element is made of metal, and the rod-shaped element is provided with an isolating coating at least in a length section starting from the second end, an electrode strip is provided that extends along a longitudinal axis of the rod-shaped element without being electrically connected to the rod-shaped element, whereby the electrode strip comprises a high impedance material and represents in a cross section, which lies perpendicularly to the longitudinal axis, a circular arc segment, at least one flattened length section is provided which starts at the second end and where in the range of the at least one flattened length section the metal of the rod-shaped element is exposed, said electrode strip being positioned adjacent to the flattened length section, first contact means are provided, in order to establish an electrical contact to the rod-shaped element, second contact means are provided, in order to establish an electrical contact to the electrode strip.