DT operations at JET gave a unique and invaluable opportunity to design, develop and test real -time controllers that will be applied in future burning plasma devices, as ITER and SPARC. Among them, the dud detector [L. Piron et al. 2019 Fusion Eng. Design 146 1364] is of primary importance since it allows to optimize the limited neutron and tritium budget consumptions. Such kind of a detector has been finalized and routinely used during DT experiments performed in 2021. In this work, we are proposing an innovative dud detector based on the experience gained during DT operation, namely add a metrics which supervises the H mode behaviour and allows redundancy on the input signals to cope with possible diagnostic and/or signal failures.