Endress+Hauser Prothermo NMT81 - Installation Procedure

Installation Prothermo NMT81
24 Endress+Hauser
5.8.1 Water level measurement in the three layers condition
When measuring the water level with three layers (air, product, and water) present in the
range of the water bottom (WB), the accuracy of the water level measurement is negatively
influenced by the dielectric difference between air, product, and water.
NMT81 compensates for this influence by comparing the product level from NMS8x or
NMR8x. NMT81 also eliminates the influenced dielectric difference with this compensation
result so that the water bottom (WB) maintains high probe accuracy and stable measurement.
A
B
C
a
b
c
A0042784
 12 Water level measurement in three layers
A Air
B Product
C Water
a Low dielectric
b Dielectric
c Conductivity