L-2455 Diode Array Detector

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	Outstanding sensitivity The innovative optical system combined with the optimized software has achieved a noise level as low as about one third of the level so far achieved by the conventional diode array detectors (compared with our existing models). Model L-2455 breaks the stereotypical idea that "diode array detectors are low in sensitivity." Not affected by ambient temperature The large lamp house of the L-2455 provides a stable light source. In addition, the new design allows isolation and heat insulation between its spectrograph and lamp house, helping cool the lamp house alone, thus protecting the spectrograph from fluctuations of ambient temperature. Moreover, a built-in temperature sensor has been newly added along with a fan that can adjust airflow rate according to temperature changes. All these design improvements help resolve internal temperature increase of the equipment and ensure higher-performance data analysis with low noise and high stability. Precise spectral data through optimized wavelength resolution The L-2455 is equipped with a 1024-bit photodiode array that provides high wavelength resolution (0.78 nm/bit). Additionally, the use of a grating spectrograph permits an optimized wavelength resolution consistent from the UV to visible range. High-speed data analysis made possible by digital noise reduction The incorporated digital noise reduction technology provides low-noise, sharp peaks even with a sampling period as short as 0.05 sec. Automatic wavelength check A mercury lamp is built in to perform an automatic wavelength check in the UV range, which is most frequently used for HPLC analysis.

Specifications

Item L-2455 Diode Array Detector Number of photodiode bits 1,024bit Light source D2 lamp and Hg lamp (for wavelength inspection) Wavelength range 190 to 900 nm Correctness of wavelength ±1 nm Noise 0.5 x 10-5 AU or less (Air in cell) Drift 0.5 x 10-3 AU/h or less Spectrum collection cycle Selection from 50, 100, 200, 400, 800, 1600, and 3200 ms Material of wetted part Quartz glass or fluorocarbon resin Functions for GLP Date of lamp change, number of lighting times and lighting hours, energy, and automatic wavelength inspection Outside dimensions/weight 340 (W) x 400 (D) x 150 (H) mm; approx. 13 kg Power supply/power consumption 24 V DC, 85 VA (supplied from organizer) *A separate 120 W AC adapter is required when the Organizer is not provided.