Abstract: Linear accelerometer mechanism having a mounting flange with an opening therein. A body is to be carried by the mounting flange and also has an opening therein. A float, a pendulous elongated member having one end secured to the float and a cylindrical torque coil secured to the other end of the pendulous member are disposed in the opening of the body. Means is provided for pivotally mounting the float, the pendulous member and the torque coil in the body to permit pivotal movement about a pivot axis. A planar conducting element is carried by the pendulous member. Pickoff means is carried by the body adjacent to the planar conducting element. First and second covers are disposed on opposite sides of the flange and close the body and are secured to the flange to aid in providing liquid-tight seals between the covers and the flange.