Abstract: Embodiments of a flow system are provided. The flow system includes a flow source device configured to receive fluid from a first flow line and output fluid on a second flow line. An output is in fluid communication with the flow source device on the second flow line. An actuation system is in fluid communication with the second flow line through a third flow line. A flow meter measures a flow rate in the second flow line without bypassing any fluid to the first flow line. A controller is in communication with the flow source device and the flow meter. The controller adjusts the flow source device to achieve a desired flow rate at the output based on a condition of the flow source device and the flow rate measured by the flow meter.

Abstract: A flowable material level sensor for use in a material containment structure which closes or activates a switch when the flowable material in the containment structure reaches a predetermined level. The sensor includes an elongated rod or wand which extends downwardly from a sensor housing positioned in the containment structure. The sensor includes an actuator assembly which converts angular or lateral movement of the rod into upward longitudinal movement of an actuator element therein which closes the switch when the level of material in the containment structure has reached the predetermined level. The closure of the switch is communicated to a monitoring station remote from the containment structure.