Agilent Technologies 34970A Data Acquisition Switch Unit

The Agilent Technologies 34970A Data Acquisition/Switch Unit, when paired with the 34901A 20-Channel Multiplexer module, provides a compact, modular platform that multiplexes up to 22 signals (20 channels on the multiplexer plus two fused inputs for the internal DMM) in a single chassis for automated testing and data logging. The 34901A module supports 20-channel general‑purpose multiplexing with two- and four-wire scanning, a 60-channel-per-second scan rate, and 300 V switching, enabling fast, dense measurements across voltage, resistance, and thermocouple inputs without external front‑end hardware. It also includes a built‑in thermocouple reference junction and is designed for use with the 34970A/34972A family, delivering flexible configurations for thermocouple, RTD, DC voltage, current, and resistance measurements in lab benches and automated test rigs.