Abstract: A cantilever type velocity sensor which includes a unitary elongated frame member mounted on spaced walls of a base of dielectric material. A planar spring member has one end portion thereof mounted to an integral adjustable portion of the frame and the other free end thereof mounting a mass engageable with another integral adjustable portion of the frame. The first portion is adjustable to set the preload force and the second portion is adjustable to set the travel distance between the mass and the contact means of the sensor. A third integral adjustable portion of the frame limits vibrational movement of the spring member relative to the frame. A resilient stop means is engageable by the mass upon actuation of the sensor to obviate contact bounce and ensure adequate closure time. Both the contact means, in the form of a columnar coil spring, and an integral terminal portion of the frame, are monitored by a resistor connected thereacross.