NSL-M COMPACT PROCESS LEVEL TRANSMITTER
Probe type process level transmitter is the compact, high temperature alternative to the NSL-F. Accommodates Top down, bottom up and side mount installations. Measurement is temperature and pressure independent. Optional user interface MPI-200 allows field configurability of orientation, range, and signal output options.
The potentiometric measuring principle measures the change in the voltage ratio between the electrode rod of the sensor and the metallic wall of the filled tank. An electric flow field arises in the medium due to the conductivity of the medium and its capacitive properties. This gives rise to a voltage ratio that is proportional to the immersed part of the rod.
Because only the ratio of the voltages is considered, the properties of the medium, in particular the electrical conductivity of 50 μS/cm and higher, do not enter into the measurement result. The sensor also provides information on the immersion situation of the electrode rod in the medium by means of a second, patent-pending measurement system.
This system analyzes electrical resonance properties to detect foam and suppress it in the results, and to reliably prevent erroneous measurements due to adhesions.
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