A monitoring system includes one or more monitoring devices, positioned in sewer manholes, storm drains, etc., and a remote monitoring station that communicates wirelessly therewith. The monitoring device may be an integrated unit, including sensors, a two-way telemetry unit, a power supply, a processor,...http://www.google.es/patents/US20070103324?utm_source=gb-gplus-sharePatente US20070103324 - MONITORING SYSTEM AND METHOD
Número de solicitud: 11/426,006 Número de publicación: US 2007/0103324 A1 Fecha de presentación: 22 Jun 2006 Patente emitida: US7626508 ( Fecha de emisión 1 Dic 2009)
