Sensor Networks are the key technology used in Envisense projects.

Sensor networks are large-scale ad hoc self-organizing networks of devices that have basic sensing, computation and communication abilities and operate with limited power.

The sensing devices are small, allowing many to be deployed in large numbers and operated redundantly - many sensors monitor the same area thus reducing the effect of a single hardware failure. The energy constraints, redundancy and the limited comms bandwidth necessitate in-situ data aggregation - the combination of multiple sensor readings to summarize the data.

In Envisense, arrays of sensors are connected to nodes that may be networked in an ad hoc way and may perform considerable data processing before passing information on.