The LMT sanitary levels sensor utilizes impedance spectroscopy technology to accurately detect levels in challenging conditions. It measures electric and magnetic fields at multiple frequencies, identifying unique medium signatures. The sensors provide reliable detection despite the presence of deposits, foam, or residue, thus enhancing efficiency in various industrial applications.
Deposits and foam often make reliable level detection difficult. The impedance spectroscopy technology measures the electric and magnetic field strength at multiple frequencies between 50…200 MHz range. Each medium creates a unique signature profile across this high frequency spectrum sweep. At each point, three measurements are made:
When the medium is present, these measurements match the profile. With no medium present or only residue present, the measurements do not match. When the measured profile falls in the green switching zone, the output of the sensor changes state.
Other media have different profiles. Using IO-Link, the medium process values can be evaluated and used to distinguish one material from another, i.e., oil vs. water, whole milk vs. 2% milk, etc.
Features:
All versions are programmable, but factory default settings are available for water-based media, oil-based / powder media, and high sugar-content media.