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L4400 Series LXI Switch and Control Instruments

The Keysight L4400 Series of switches, digital input/output and analog output instruments offer the best tradeoff in size, functionality and test. They are standalone instruments that perform the same function as their companion 34980A-Series plug-in modules. They come with a fully operational programming interface including a web-page for easy control.

For applications that require the performance of the Keysight 34980A Multifunction Switch/Measure Unit at a lower channel count.

Need help deciding which modules are right? Use our step by step guide

Learn more Switch/Measure 10-Tips Videos

Compare All L4400 LXI Switch & Control Instruments (4)

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  • L4421A 40-Channel Armature Multiplexer L4421A 40-Channel Armature Multiplexer (1) 

    L4421A 40-Channel Armature Multiplexer

    • 2-wire latching armature relays
    • 300V, 1A switch; 2A carry current
    • Thermocouple reference
    • Scan up to 100 ch/sec

  • L4437A 32-channel Form A/Form C General Purpose Switch [Discontinued] L4437A 32-channel Form A/Form C General Purpose Switch [Discontinued] (1) 

    L4437A 32-channel Form A/Form C General Purpose Switch [Discontinued]

    • 28 form C channels, up to 1A, 50W
    • 4 form A channels, up to 5A, 150W
    • Armature latching relays with relay counter

  • L4445A Microwave Switch/Attenuator Driver L4445A Microwave Switch/Attenuator Driver (1) 

    L4445A Microwave Switch/Attenuator Driver

    • Control microwave switches and attenuators
    • Expandable with 34945EXT
    • Distribution boards for easy wiring
    • External power option

  • L4450A 64-bit Digital I/O with Memory and Counter L4450A 64-bit Digital I/O with Memory and Counter (1) 

    L4450A 64-bit Digital I/O with Memory and Counter

    • 64 bi-directional digital I/O bits
    • Variable thresholds from 0V to 5V
    • 128K pattern memory
    • Two 10 MHz counter/totalizer channels