The Hioki 3239-01 is a multi functional and high precision multimeter. The 323901 can perform 3.3 ms high-speed sampling, and comes equipped with a comparator, external input and output, an RS-232C and GP-IB interface. The 3239-01 is a high-precision, broadband model that also features current measurement terminals and a frequency measurement function, plus the 4-terminal resistance measurement function.