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Product information
AZURA® Detector DAD 6.1L, DAD 2.1L, MWD 2.1L Instructions, V6700
The detectors measure the light absorption of the sample in the ultravio-
let and visual spectra. The entire spectrum permeates the sample and
after wards is split up by a grate. The split light falls onto a geometric array
of 1024 (DAD 6.1L) or 256 (DAD 2.1L, MWD 2.1L) separate photodiodes –
the photodiode array.
The optical system of the DAD 6.1L is depicted in figure 3. An active tem-
perature control with 0.5 °C sensitivity ensures baseline stability for mini-
mal baseline drift.
You can exchange the lamps quickly and easily without the need of a ser-
vice technician (see section „9.5 Replacing the lamps“ on page 53).
DAD 6.1L: Two light sources, a deuterium lamp and a halogen lamp,
cover the entire UV-Vis wavelength range from 190 to 1000 nm.
DAD 2.1L, MWD 2.1L: One deuterium lamp covers the UV wavelength
range from 190 to 700 nm.
Maximum light intensity over the entire UV-VIS range is provided by effec-
tively mixing the light sources from the deuterium and halogen lamps
with a mirror using Polka Dot technology.
Various types of flow cells allow a wide range of applications. Flow cell
cartridges with KNAUER PressureProof and KNAUER LightGuide techno-
logy as well as KNAUER Fiber Optics Technology are available (see chap-
ter„13. Reorders“ on page 64).
KNAUER LightGuide Flow Cell Cartridges combine a maximum light
transmission (using total reflection) with a minimum cell volume to
offer an ideal signal-to-noise ratio.
KNAUER PressureProof Flow Cell Cartridges are optimized for conven-
tional and high flow HPLC and FPLC applications. These flow cells fea-
ture an increased pressure stability (up to 300 bar) and extended flow
rate range (up to 20 ml/min).
KNAUER Fiber Optics Technology: Adapters for fiber optics are optio-
nally available. Fiber optics allow separating the flow cell from the de-
tector. This way, working with dangerous, explosive, or toxic materi als
becomes safer. Remote flow cells are recommended for preparative
applications (high flow rates), in order to protect sensitive optical com-
ponents from potential leakages.
The detector measures with a maximum data rate of 100 Hz. During the
measurement, up to 100 spectra per second are recorded.
Integrated leak management drains liquids from leaks.
You can use the Mobile Control and the different software products (Clari-
tyChrom
®
, OpenLAB
®
, or Chromeleon
™
) to display or read GLP data like
operating hours, lamp operating hours, number of lamp ignitions, etc.
You find a detailed description on how to display or read out GLP data in
the respective software instructions.
The multiwavelength detector can be upgraded to a diode array detector.
Optical module
Lamps
Mirror DAD 6.1L
Flow cell
Data rate
Leak management
GLP data
Upgrade MWD 2.1L
