Typical situations have two pumps, both sized to handle the required flowrate, each running part time. The second pump may alternate with the first pump and is usually set to come ON at a highter level if required. Single pump or three pump situations can be handled as well.

In addition to totalizing the flow, various other operator information is displayed such as station flowrate, Pump 1 and Pump 2 individual pumping rates, Pump 1 and Pump 2 running time in hours, Pump 1 and Pump 2 ON/OFF cycles of operation. A proportional sampler contact output is standard as is a station flowrate analog output for recording purposes.

When a continuous level signal is available other functions such as pump sequencing and/or alternating are possible as are high or low alarms.