In one example in accordance with the present disclosure, a fluid ejection die is described. The die includes a number of actuator sensors disposed on the fluid ejection die to sense a characteristicof a corresponding actuator and to output a first voltage corresponding to the sensed characteristic. Each actuator sensor is coupled to a respective actuator and multiple coupled actuator sensors andactuators are grouped as primitives on the fluid ejection die. The die also includes an actuator evaluation die per primitive to evaluate an actuator characteristic of any actuator within the primitive Based on the first voltage and a threshold voltage. The die also includes a time-shift chain component to communicate a delayed evaluation signal, which delayed evaluation signal delays an evaluation of the actuator characteristic a predetermined amount of time following an activation event.