Stuff that sticks to the sides of the container makes accurate level measurements difficult. The LMT Series from ifm efector specifically addresses this problem for viscous media and powders in food and beverage processing tanks and pipes.
High frequency (MHz) capacitive spectrum profiling technology enables the sensor to ignore foam and deposit build-up and differentiate between residue and actual product in a tank.
The solution involves sweeping the frequency band of 50 to 200 MHz for the capacitive sensor and taking three measuring points: electromagnetic field damping, permittivity phase shift of the molecule polarization in the magnetic field, and the media conductivity in the electric field. An algorithm in the sensor processes these measurements to calculate the signal amplitude.
For more information including a video about ifm efector’s LMT Series Sanitary Point-Level Sensor, click here.
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