Agilent/Keysight DAQM908A

The Keysight DAQM908A is a 40-channel single-ended multiplexer module that routes one-wire inputs to the internal DMM of DAQ970A and DAQ973A mainframes. Built for high-density switching in common-low applications, it enables rapid channel scanning and floating-low operation essential for battery testing and component characterization. Two-wire measurements are supported for all measurement types except current.

Technical Specifications

• Channels: 40 one-wire inputs


• Switching Architecture: Single-wire switching with floating low connection


• Scan Rate: Up to 100 channels/second


• Maximum Switching Voltage: 300 V


• Current Rating: 1 A


• Low Connection Isolation: Floats up to 300 V from earth ground


• Measurement Capability: Two-wire support for all types except current; 2-wire RTD and Thermistor temperature sensors only


• Weight: Approximately 0.5 kg

Key Features

• Isolated, floating low connection rated to 300 V enables common-low measurement configurations


• High scan throughput supports large-scale multiplexing tasks


• Two-wire measurement flexibility across voltage, resistance, and temperature domains


• Direct integration with DAQ97x series instrumentation

Typical Applications

• Battery testing and characterization


• Component parameter verification


• Multi-channel benchtop measurements


• High-density switching environments

Compatibility & Integration The DAQM908A operates exclusively with Keysight DAQ970A and DAQ973A Data Acquisition/Switch Unit mainframes. It is not compatible with legacy 34970A and 34972A models. Each module ships with one functional test certificate.