The Model 5318B Level-Tek is a RF capacitance point (On/Off) level switch that employs all solid-state electronics for detecting predetermined product level changes in tanks, sumps, silos and other vessels or containers. The Model 5318B is capable of detecting a variety of products, including liquids, powders, granular, lump and flake materials. The product can be conductive or non-conductive, depending on the probe selection. Probes are sold separately.