Deuterium Tungsten-Halogen Light Source


  • Great Stability
  • UV-Vis-NIR Spectral Range
  • Lamp and Shutter Selector
  • Optical Fiber Connector
  • Remote Control with SPEC Hub

    A compact light source

    LS-DW is a compact light source that combines the continuous spectrum of deuterium and tungsten lamps into a single optical fiber SMA connector. The combined spectrum produces a stable output and delivers the ideal light intensity for most absorbance and transmittance measurements ranging from 185 to 1100 nm. 

    Granted flexibility

    The local shutter incorporated on the DW light source simplifies the operation for dark measurements without the need to turn off the light source, while the lamp controller makes it easy to select between an individual or combined deuterium and tungsten lamp operation.

    Select only the lamp you need

    DW light source has an integrated lamp selector that allows you to choose between a single and combined deuterium and tungsten lamp operation, according to your spectral region of interest.

    Shutter control for maximum performance

    The built-in shutter controller included on the DW light source enables a simple operation for dark measurements or reducing the exposure of samples to UV light without the need for shutting off the light source, resulting in a more stable and extended lamps lifetime.

    Control your light source remotely

    The DW light source can be remotely controlled by using our SPEC Hub. Creating event tables for turning on/off the light source, selecting individual or combined lamp illumination, and enabling/disabling the shutter has never been so easy!

    Setup Examples

    Absorbance with Standard Cuvette Holder


    Standard Cuvette Holder



    Patch Cord


    Patch Cord


    FLEX Spectrometer


    Deuterium Tungsten Light Source


    Technical Information


    Wavelength Range
    185-1100 nm
    Deuterium Lamp Lifetime
    1000 h
    Tungsten Lamp Lifetime
    2000 h
    Local Operation
    Power, Shutter and Lamp Selector
    Optical Fiber Connector
    SMA 905
    Warm-up Time
    Approx. 15 min

    More Information

    Remote Operation Requires SPEC Hub and Remote Cable
    Power Consumption (max.) 6 W
    Power Requirements 12 VDC / 0.6 ADC
    Dimensions 200 (L) x 65 (W) x 65 (H) mm
    Weight 800 g

    Typical Applications

    DW is a high stability UV-Vis-NIR light source that meets the demands for absorbance and transmittance measurements of non-opaque liquid and solid samples. With the advantage of modularity, DW offers great stability and large flexibility for educational, scientific, and industrial spectroscopic measurements. Find out more about our measurements set-up that use DW light source in our Applications Notes Database.

    Ordering Information

    DW Light Source (power supply included)
    Lamp Unit Replacement (185-1100 nm)
    SPEC Hub for LS-DW Remote Control (cable included)

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