Level limit switches
Thanks to their capacitive measuring principle, our level switches are particularly suitable for detecting the level of liquids in metal containers or pipes, regardless of the conductivity of the medium. Foam or condensate are not detected. Due to the modular design of our level limit switches, they are particularly suitable for the food and pharmaceutical industries, as hygienic and almost flush installation is guaranteed when using our weld-in sleeves. The output signal can be switched directly to a PLC, resulting in low wiring costs and high interference immunity. The type LLS 250 is particularly suitable for viscous, adhesive or pasty liquids due to its extended measuring nozzle.
Level rod probes
The conductive level probes are used for level detection in conductive liquids. The tank or pipe wall is used as the counter potential. As an option, the electrode can be provided with a special PFA coating, which means that foaming media can also be reliably detected. The level rod probes can optionally be equipped with an integrated evaluation module. The output signal can be connected directly to a PLC, resulting in low wiring costs and high interference immunity.
Level device for top hat rail mounting
These devices are used for conductive level monitoring in electrically conductive liquids. Level control can be implemented on channel 1 via a MIN and MAX electrode. A pump or valve can be controlled directly via a potential-free changeover contact. The switching time delay is adjustable. An overfill protection or dry run protection can be implemented on channel 2 with an additional electrode.
Optical limit switches
They are suitable for level control, especially in water-based and aqueous media, e.g. dry-running protection for pumps, level monitoring in rinsing units of cleaning systems, and many more.
They are particularly easy to put into operation. The sensor is based on an energetic diffuse sensor. No adjustment to the medium is necessary.
Switching output: normally open or normally closed contact
Hygrostatic level measurement
For hygrostatic level measurement we offer our immersion and screw-in probes.
Different housing materials (e.g. stainless steel, extremely resistant ceramics or robust plastics), sensor technologies as well as cable and sealing materials ensure that level detection is always accurate and reliable.
Hygrostatic measurement is the best phsical measurement method for level detection, regardless of whether the medium is contaminated, corrosive, thin or viscous.
Precondition for use: constant medium density.
The output signal of the sensor must be adjusted to the respective medium (with known density), e.g. in mbar/bar, mH2O or liquid column.
A hydrostatic pressure depends on the filling level, the density and the ambient pressure acting on the medium. The ambient pressure is taken into account by the integrated relative reference.
Immersion probes are suitable for measurement in open vessels and water (immersion from above). They are equipped with a cable and are completely immersed in the medium, as close to the bottom as possible.
Screw-in probes are additionally required for measurement in closed vessels, since here the pressure prevailing above the medium in the vessel differs from the ambient pressure.
For level measurement with screw-in probes, they are mounted pressure-tight on the side of the vessel wall.
