[en] A hand and shoe monitor will be described which represents a significant departure from the traditional in that it utilizes air ionization probes with simple analog electronic circuitry. Two primary problems which required solution during the development of the monitor were: a probe design that would not only protect the fragile window but would also minimize electrical signals due to window vibrations caused by the user stepping on the probes and a circuit design which would shorten the long response time of a typical low level ionization chamber input amplifier. The monitor has sensitivity comparable to the presently available equipment. Its attractive features include low initial cost and no predictable failure modes other than severe window damage by careless users. Because of the simple design, minimal expertise and facilities are required for fabrication and maintenance