Monitoring system prevents sewer spillProblemA sewer in West Covina, Calif., overflowed occasionally. Operators needed a way to monitor the level and receive alerts before spills occurred.SolutionThey installed the SL100 sewer level monitoring system from D&D Engineering in the pump control cabinet. The system has an ultrasonic level transmitter, data logger, cellular data modem and backup battery.ResultWhen a power failure shut down the pumps a year later, the system emailed maintenance employees in time to dispatch a portable generator, power up the pumps, and prevent a major spill. 888/333-6474; www.sensorguys.comAntenna system controlsdeep tunnel networkProblemThe Metropolitan Water Reclamation District of Greater Chicago,
