“…Without doubt, the accuracy of the measurement output y(t) plays a key role in output-feedback design for system (1). 1,2 When the measurement sensitivity is a known constant, eg, (t) ≡ 1, the global output-feedback stabilization problem of system (1) has been well addressed in the literature under various conditions on f i (x(t), u(t), t) (see, for instance, other related works [3][4][5][6][7][8][9][10][11][12] , as well as the references therein). Unfortunately, in practice, the measurement sensitivity (t) is in general time-varying as pointed out in the works of Carr 13 and Chen et al 14 ; the unknown time-varying derivation of (t) from the desired nominal value nominal = 1 is known as (sensor) sensitivity error.…”