| 摘要 |
A pressure transmitter for transfer of a pressure prevailing in a first medium onto a second medium, including a pressure chamber 4 in a platform 1 , which chamber is separated from the first medium by means of a dividing membrane 2 , wherein the pressure can be transferred by means of the second medium to a pressure measurement cell. For timely recognition of an impending failure of the dividing membrane, an early warning detector is provided with a sensor chamber 6 having an opening, which faces the first medium; and a sensor 7 , which monitors a property of a medium container in the sensor chamber; and a barrier facing the first medium, pressure-tightly sealing the opening, and which, under contact with the first medium and equal conditions as experienced by the dividing membrane 2 , fails earlier than the dividing membrane, thus making possible a flow connection between the sensor chamber 6 and the first medium. Preferably, the barrier is in the form of a sacrificial membrane 5 , which is thinner than the dividing membrane. In this way, it is to be expected that, under corrosive destruction of the membranes, the sacrificial membrane 5 will be destroyed earlier than the dividing membrane 2.
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