NASC’s SLS200/25BBS is designed to sense liquid in tanks where tops and bottoms of the tank are inaccessible. A liquid is detected by the oat, the rocker and magnet assembly is positioned horizontally while the magnetically pulling the hermetically sealed reed switch into the Normally Open or Normally Closed position. We also offer this switch in 316SS or with a 100 VA reed switch. The SLS200/25BBS is precision machined from a solid piece of Brass Hex Stock, No wetted parts. Specifications regarding this model may change without notice. Consult factory for custom configurations.