Resettable sensor assembly and system

A resettable sensor assembly includes a body having a axis and defining a cavity therein. The body includes a first plurality of threads disposed about the axis. The assembly includes a housing mated to the body and including at least one electrical contact. The assembly further includes a plate. The assembly also includes an actuator element configured for translating the plate along the axis between a first position in which the plate contacts the at least one electrical contact and a second position in which the plate is spaced apart from the at least one electrical contact. The element is formed from a shape memory alloy that is transitionable between an austenite crystallographic phase and a martensite crystallographic phase in response to a thermal activation signal to thereby translate the plate between the first position and the second position.