Remediation Tank Liquid Level Sensor


chemical-feed

chemical-feed

When a US manufacturer of groundwater remediation equipment needed reliable level measurement in their vacuum pumping systems, they turned to Flowline. The company uses variable speed pumps to continuously extract groundwater and transfer it into their water treatment systems. Upon reaching the surface, the water first passes through a small vacuum tank that serves as a buffer between the water table and treatment system. Level measurement of the tank, which should remain relatively constant, is used to regulate and protect the variable speed pumps. As the level falls, the pump speed is proportionately increased, and as the level rises, the speed is decreased. The presence of vacuum makes this a very challenging application to measure. For this reason, Flowline suggested the use of pulse radar sensors which are unaffected by changes in pressure or vacuum within their specified ranges. The result is reliable vacuum tank level measurement. Here, an EchoPulse 26 GHz pulse radar level transmitter is mounted on the steel vacuum tank in the fab-shop. The 4-20 mA signal output will be connected to the PLC.