Refurbished Keysight-Agilent 44421A

The 44421A 20 Channel Relay Multiplexer Assembly is a reed relay multiplex card to be used in the 3497A Data Acquisition System. Each card switches 20 channels and each channel has a HI, Lo, and Guard line. The low thermal offset of the relays make it suitable for measuring the outputs of strain gages and other transducers.