IDTechEx research has found that the WSN market will grow to $1.8 billion by 2024. These figures refer to WSN defined as wireless mesh networks, i.e. self-healing and self-organising. Wireless Sensor Networks will eventually enable the automatic monitoring of forest fires, avalanches, hurricanes, failure of country wide utility equipment, traffic, hospitals and much more over wide areas, something previously impossible. It has started already with more humble killer applications such as automating meter readings in buildings, and manufacture and process control.The WSN business is set to become a multibillion dollar activity but only if there is major progress with standards and technology. This techno-marketing report scopes manufacturers and developers and looks closely at the impediments to rollout and how to overcome them. For example, todays power sources often stand in way of the desired 20 year life so the report looks closely at how energy harvesting can help and profiles the relevant power source manufacturers. Ten year WSN forecasts are made based on the very latest information.