The HP 34401A, also known as the Agilent 34401A, is a 6.5-digit digital multimeter (DMM) that's considered an industry standard:
Accuracy: Has an error rate of 0.0015% for DC and 0.06% for AC
Ease of use: Has a large, clear display and automatically adjusts the range to the measurement being taken
Flexibility: Can be used on a bench top or in a system, and has features like a reading hold and internal memory for up to 512 readings
Cost: Has a low cost of ownership
The 34401A can measure DC and AC voltage and current, resistance, frequency, period, continuity, and diode tests. It also has GPIB and RS-232 interfaces, and can send up to 1,000 readings per second in ASCII format.