A system for generating a signal indicative of a state of a user's body. The system has a housing assembly and first and second spaced electrodes on the housing situated so that an electrical impulse can be generated a) through the first electrode to a first user appendage in operative contact with the first electrode and b) from a second user appendage in operative contact with the second electrode to the second electrode, to thereby allow generation of a user impedance signal. The user impedance signal is useable to identify a state of a user's body. The housing has an electrically insulating barrier assembly defined between first and second discrete contours at or adjacent to which the first and second electrodes are respectively located. The insulating barrier assembly resides between first and second user appendages in operative contact with the first and second electrodes so as to block direct contact between the first and second user appendages.