710599BOLTEDClosedGRD Proof of ConceptInnovate UKOur proposal is to develop a low power passive bolt tension checking device measuring load from strain gauges located in a hole along the axis of the bolt. The device can be encapsulated thus protecting it from corrosion. The system we term as BOLTED harvests energy from the tower to energise the system and checks the bolt tension several times a day and reports the information to a wireless transmitter that then transmits the information to a condition monitoring system.