The DT4251 is a digital multimeter, manufactured by HIOKI. This can operate with basic accuracy of ± 0.3%DC V, frequency of 40Hz to 1kHz AC V and operating temperature of -15° to 55° C. It is equipped with low-pass filter that cuts high harmonics. It can measure capacitance and frequency, including large currents having optional clamp probe. This is designed with USB communication function which supports PC measurement.