Wireless sensors for industrial applications are expected to open large opportunities for data collection where it has traditionally been considered technically impossible or cost prohibitive. To overcome installation and acceptance barriers a wide variety of requirements must be satisfied. Some of these barriers include cost and reliability. Short-range wireless technologies such as IEEE 802.15.4 combined with mesh networking techniques are being widely considered as the answer to both cost and reliability in industrial settings. However RF communications, particularly indoors, is well known to be unpredictable. Wireless Mesh Sensor Networks are being deployed today in various monitoring and control applications. Some radio network designs, such as ZigBee, presume that radio connectivity is reasonably consistent over time. Others take the opposite approach of presuming that links are entirely unreliable, and build large degrees of physical redundancy into the network in the hope that a collection of redundant but unreliable individual links will result in a reliable overall system.