Working principle
A float with a built-in magnet moves with the surface level of the medium being measured along a guide tube in which a row of small reed switches are installed.
In conjunction with a resistor chain an output signal can be generated which is proportional to the float position and thus to the level of liquid. Various resolutions are available and can reach up to 5 mm depending on the application. Versions which work on the magnetostrictive principle can provide resolutions down to below 1 mm.
Area of application
Suitable for almost all liquids. A constant indication of liquid level regardless of foam or changes in the dielectric number, in the conductivity, the pressure or the temperature.
Special models can carry out interface level measurements.
Temperature
-50 °C to +120 °C to +250 °C with special versions)
Pressure
From vacuum to 40 bar (4 MPa). (Versions for higher pressures available.)
Materials
Stainless-steel, Titanium, Hastelloy, PVC, polypropylene, PVDF, PTFE, Teflon and E - CTFE coatings.
Output
Continuous analogue resistor output (potentiometer circuit), which can be converted with a suitable KSR Kuebler measurement transformer (e.g. into a 4 - 20 mA signal, HART, Field Bus etc.)
Fitting and Types
Flange mounted or screw-in thread, with installation from below or above. For the angled version the inlet is at the side. Length of the guide tube up to 12,000 mm in one piece and up to 25,000 mm made from several parts. Versions are available for the foodstuffs industry. At the side: Flange mounted or screw-in thread. |