A device for measuring differences in conductivity that allows early detection of infectious/inflammatory periodental and/or apical diseases or in joint and/or muscle regions, before they can even be detected radiologically. The device has an electrical emitter in millivolts, with a given negative-peak square wave and a given frequency, both defined by a pulse width and interval between pulses, which, by means of two electrodes, one stationary and one movable, is able to produce a mild tingling sensation on the patient's skin immediately over the teeth apices or joint and/or muscle regions as well as dermatological, glandular and integumentary areas affected by inflammation and/or infection and display the intensity of the condition affecting the tissue to the professional on an illuminated scale display.
