Patent ID: 7251985
Filing Date: 2007-08-07
Classification: G01L

Abstract:
1. A measuring arrangement, comprising: a measuring transmitter having: a sensor for registering a parameter of a medium, wherein the sensor issues a primary signal dependent on the parameter; a transmitter housing, which defines at least one chamber in its interior, and which has a first opening on the side facing the medium and a second opening, wherein a first section of a contamination path reaches from said first opening to said second opening, and extends through said at least one chamber; a first seal, which interrupts said first section of said contamination path; and an electronic circuit, which is arranged in said at least one chamber, wherein said electronic circuit processes the primary signal of said sensor and produces an output signal, which is issued over a first section of a signal path extending through said second opening; a safety module, which includes: a module housing, which defines at least one module chamber in its interior, and which has a first module opening on the side of said measuring transmitter and a second module opening, wherein a second section of the contamination path reaches from said first module opening at least as far as into said at least one module chamber; at least one second seal, which interrupts said second section of the contamination path; and a second section of the signal path; and a leak detector, wherein: said safety module is connectable with said measuring transmitter such that said second section of the contamination path connects to said first section of the contamination path; and said second section of the signal path connects to said first section of the signal path, in order to further conduct the output signal from said first section of the signal path; and said leak detector monitors a part of the contamination path arranged between said first seal and said second seal, in order to detect and to signal the failure of said first seal.