A local Siemens representative was visiting a construction site for a new water/ wastewater treatment plant in the Southeast United States. Recent growth in the local housing market near an EPA wetlands area required the installation of a new package treatment plant. Discharge permits for this new plant would require continuous flow monitoring and strict discharge levels for chlorine residual. The accuracy and reliability of the level/flow measurement and chemical feed control system was critical. The discharge flume from the wastewater treatment plant would be approximately 14 meters from the wetlands buffer zone.

The representative recommended using the SITRANS Probe LU transmitter as the primary level device for a Parshall flume at the plant effluent. This level measurement would be sent to a chart recorder which would re-transmit the calculated flow measurement to the metering pump’s flow-proportional controller. The flowproportional controller would receive the flow signal and transmit a dosing signal to the hypochlorite metering pump. The Siemens Probe LU was a logical choice for this critical application. The client was familiar with the accuracy and reliability of the instrument because of their experience with the product at many of their other sites. The Probe LU became the key component of the hypochlorite dosing system. The client’s confidence in Siemens products provided the opportunity for the representative to provide a turnkey solution for the entire hypochlorite system. Siemens track record of success and the support provided through the local representative was critical to the customer’s decision.