How it works
Any number of small, reusable sensors are embedded inside the concrete, and the lead wires are routed to the outside of the formwork. The lead wires are plugged into wireless nodes, and the nodes are powered up. Nodes begin to record concrete temperatures in two ways:

Nodes transmit data via the cellular network wirelessly to “the cloud” where data is instantly visible to any user.
Nodes simultaneously record data onto an SD card as a backup.
The recorded temperature histories of the concrete are then applied to one or more industry-standard formulas, and the concrete strength is accurately estimated (per ASTM C1074). Click here for more details about the maturity method itself.

Unlike previous systems, NEX® nodes have virtually unlimited range. If cell service is intermittent, the nodes send the data when they can. The SD card always records all of the data. If necessary, the data from the SD card can be uploaded to the cloud separately.