The 34190A is a modular digital multimeter designed and manufactured by Keysight Technologies (formerly Agilent). It is a high-end digital multimeter that provides precise measurements with a wide dynamic range and industry-leading accuracy. It is suitable for a range of applications, including inspection and troubleshooting of electronic circuits. The 34190A has a 5½-digit resolution and a total of 20 measurement functions, including DC voltage, AC voltage, resistance, capacitance, diode, transistor hFE, continuity, duty cycle, and temperature. Additionally, it offers data logging and includes a built-in RS-232 interface for connection to a computer.