SpectraFlow 2050

Diode Array Detector (DAD)

This detector is an analytical Diode Array Detector (DAD) that allows simultaneous absorbance measurements of eight wavelengths in one cell just as well as measuring the whole absorbance spectrum. In liquid chromatography this unit is used to verify analysed samples by means of eight wavelengths or complete scanned spectra. The unit uses a high standard deuterium lamp in a special socket which enables a rapid and simple lamp exchange directly from the device’s front panel. Using a test cell at 254 nm the noise level is ± 5 x 10-6 AU. Three selectable flow cells are available: AD02, AD05 and AD10 with an optical path length of 2.4, 5 and 10 mm, respectively. They can be easily replaced from the side of the detector. The output signal can be obtained in both digital and analogue form. This detector can be programmed, controlled and used manually by keypad or together with the software Clarity® via USB or ethernet interface, therefore it is a complete „stand alone“-instrument, which maybe combined with HPLC-System of other manufacturers. The Clarity® PDA module supports the 3D measurement. The diode array principle enables the user to perform a continuous scan up to 100 Hz or alternatively an absorbance measuring on eight wavelengths simultaneously. The available wavelength range is from 200 – 800 nm in increments of 1 nm.

TECHNICAL PARAMETERS  
Wavelength range 200 – 800 nm
Spectral half-width 10 nm
Accuracy of adjustment ± 1 nm
Reproducibility ± 0.5 nm
Light source Deuterium discharge lamp, halogen lamp
Noise (Test cell, 254 nm, TC 1s, 10 Hz) ± 5 x 10-6 AU
Drift (Test cell, 254 nm) 1 x 10-4 AU/h
Time constant 10 – 10 000 ms
Sampling speed up to 100 Hz
Digital output 1 V/AU
Analog output 4 x; configurable
Wetted materials fused silica, stainless steel, PEEK
Communication USB, Ethernet (LAN)
Display VFD; 140 x 32 pixels
Keypad 10 Pushbuttons
Power supply 100 – 240V; 50 – 60Hz; 110 VA
Dimensions (w x h x d) 280 x 135 x 498 mm
Weight 9 kg