This general purpose liquid or gas switch package provides a complete solution for low flow pump or process protection with a 10A compact relay controller for actuation. The optional flash alarm brings immediate attention to low flow conditions. The short sensor is intended for use in pipe or ducting from 1/2” to 1-1/2”; the long sensor is applied in 2” and up. The product is broadly selected for low or no-flow applications. Specify the appropriate sensor technology, length and material.