When a Boston office building needed reliable level measurement of their greywater bulk storage tank, they turned to Flowline. A LEED compliant design, the building collects, filters and reuses rain, sink, laundry and dishwater to irrigate their landscape. Greywater flows into four lift stations that transfer it to the basement storage tank. There the operators had intermittent problems with a different ultrasonic level sensor due to warm water, and the resulting condensation that attenuated the acoustic signal. For this reason, Flowline suggested the use of our reflective ultrasonic sensors that are unaffected by condensation. The ultrasonic sensor provides continuous level data to the PLC, which in turn, monitors the tank, and controls the irrigation process. Flowline is reliable level measurement.