Abstract: A pendulum type sensor includes a housing having a plurality of recesses, each receiving a sensor module. The sensor module includes a mass assembly, a spacer assembly and a contact assembly sandwiched together and secured to each other. Each assembly includes a support defining an enclosure, with the mass assembly enclosure receiving a sector shaped recess of the spacer assembly to locate the mass and deflectable wire of the mass assembly in an unactuated preload position. The contact assembly includes a plurality of contact fingers engaged by the mass upon movement to actuated position and an ultimate stop which prevents turning moments on the mass upon engagement of the contact fingers with the ultimate stop under the force of the mass.