| 摘要 |
A sensor apparatus (1) designed for industrial applications is provided for transmitting electrical pulses from a signal line (2) into and out of a vessel to measure a process variable, which has a low outer diameter, preferably of 1 1/2 or lower, while providing high mechanical stability and maintaining a high degree of transmission efficiency. It comprises a mounting section (3) configured to be coupled to the vessel, at least two concentric at least partially overlapping dielectric inserts (6, 9, 10, 11,17) stacked inside oneanother located inside the mounting section (3), said dielectric inserts (6, 9, 10, 11,17) comprising central apertures, a conductive probe element (4) mounted inside the mounting section (3) and extending through the apertures of the dielectric inserts (6, 9, 10, 11,17) into the vessel, an electrical connector (5) configured to couple the signal line (2) to the probe element (4), wherein an electric impedance inside the mounting section (3), is nearly constant and approximately equal to the electric impedance of the signal line (2).
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