How close to the rebar should the sensors be installed?

There are no specific guidelines for this. It depends on the engineers’ choice of when to trigger the early warning. Some engineers place the corrosion sensor so that the lowest level of the corrosion wire is precisely at the level of the reinforcement to know when corrosion started at that level. However, this does not align with our philosophy of the early warning system. Therefore, the sensor is typically placed directly above the reinforcement, providing information above it. Some prefer to install the sensor as close to the surface as possible to detect trends early.