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)