Vibration type force detector

In a vibration type force detector devised so as to detect the magnitude of a force by measuring the vibration frequency of a vibration element vibrating in a magnetic field with the force loaded, the exciter employed for exciting the vibration element to make the same continue non-decaying vibration with an exciting current fed back from the voltage developed on the vibration element is improved so as to output an exciting current proportional only to the electromagnetic force generated by the vibration of the vibration element without being affected by the voltage drop made by the exciting current on the vibration element. The voltage drop component in the voltage developed on the vibration element is cancelled with an offset voltage prepared by dividing the output voltage of the exciter. Thus the exciter can amplify only the e.m.f component, if the offset voltage is adjusted to be equal to the voltage drop on the vibration element. Therefore, the vibration element can be excited effectively irrespective of its resistance and/or mechanical Q-value.