Patent ID: 7604723

Claim:
A measuring device, comprising: an elongated first electrode having a longitudinal axis for insertion into a material to be measured; a housing which at least partially surrounds the first electrode, wherein the first electrode is movable in relation to the housing in the axial direction of the longitudinal axis; a receptacle device that accommodates an end of the first electrode, wherein the housing has a base plate on a side of the receptacle device and the receptacle device is part of the base plate, and wherein the base plate is made of an elastic material; a chamber which is enclosed by the housing and is tightly sealed with respect to the outside, wherein the base plate tightly seals a lower area of the chamber; and contact rods, wherein at least one of the contact rods is connected to the first electrode, and wherein the contract rods protrude through a base plate and are bent on a bottom side of the base plate so that the bent ends of the contact rods are threaded into eyes provided on the bottom side of the base plate.