Tekniska Verken in Linköping has since many years used Wideco’s monitoring system for monitoring their district heating net in Linköping. They currently use Widecos most advanced system – the Widetect X4 device with external GPRS modems for communication to the XTool monitoring software. Linköping also sees the great advantage of securing their district heating chambers against water intrusion and invested in the monitoring Unit WiDetect A1e. This means wireless monitoring of waterlevels and temperatures in chambers. Today is about 1200 district heating chambers are monitored with low and high level alarms.