The detector comprises the following main features:

  • The detector is a dual-beam, variable wavelength photometer with one measurement and one internal reference beam.

  • Two different light sources provide a wavelength detection range from 190 nm to 750 nm (VC-D40) and from 190 nm to 900 nm (VF-D40):

    • A deuterium lamp (referred to as UV lamp) for ultraviolet and visible detection and

    • A tungsten lamp (referred to as VIS lamp) for visible and near-infrared detection (optional for VC-D40)

  • Internal validation of the wavelength accuracy with holmium oxide filter

  • Multi-Wavelength Operation for additional operation functions, measuring simultaneously at up to two (VC-D40) or four (VF-D40) different wavelengths

  • Data collection rates of up to 125 Hz (VC-D40) and up to 250 Hz (VF-D40) under Chromeleon 7.2 software or later, in single-channel mode

  • Spectra measurements

  • Two optical filters for eliminating higher order light

    To ensure optimal measurement results over the entire wavelength range, the optical filters automatically move into the light path (also in multi-wavelength operation).

  • Automatic wavelength calibration after power-up and when the lamp configuration was changed.

  • A shutter (motorized filter paddle) to move into the light path before the flow cell

    The shutter can move into the following positions:

    • Open position for data acquisition

    • Closed (dark) position for protection of the flow cell and for dark signal measurements

    • Holmium oxide filter position for validation of wavelength accuracy

  • Availability of flow cells for different fields of applications (for details, see Flow Cell Specifications)