1 Dypamica Halo DB-20/DB-20S UV / Visible Double Beam Spectrophotometer rhe Halo UB 20 sahigti perfotmanci doubla beam spectrophoiometer suiiable for many analyiical applications where a tngnc lovol of accuraCY JS reguired. Genuine Double Beam Opiics True double beam opiics ensure concurrent measurement ol the sample and rfrence for improved stabilrty. accuracY and reproducibility. The light beam is splil in Iwo using a half mirror so tha驯 one beam passes thiough Ihe sample side whilst the othei passes through the rfrence slde. Both beams are then measured on individual detectors. The r驩frence side beam also arts to sabilire phoiomelhc values in a similar manner 10 the ratio beam principle Spectral Faaturts Coma aberration 鮩limination from the concave diffraction grating achieves a hgh resolution 1.5 nm (DB-20S : 1nm) spectral bandpass and certifies compliartce of the Halo DB-20 to the stringent European Pharmacopoeia standards. Other spcifications inelude an impressive wavelength accuracy of -0 3nm. noise level 0 0003Abs (500nm) and stray light <0.05% |220nm Nal. 340nm NaN02}. Buitt-in and Diverse Range of Measurement Modes Pholometry Mode. Perform quantitative analyses in ethcr absorbance or transmittance modes Select from single wavelength, up to 6 diffrent individual wavelengths, nucleic acid/protein A260/ A280 ratios and set up calibrt ion cuves with up to 20 standards for concentration measurements Time Scan: Perform krnetic measurements for time periods ranging from I minute to >27 hours. Measurement intervais are factory preset and automatically selected when the scan time is set Wavelength scan; Perform a full spectral scan from 190 to UOOnm at any of 8 incr颩mental and preset selectable scan speeds starting from a high resolution 1 Ohm/minute up to a swift 3,600nm / minute. Data is displayed as either numencal values or a graphol spectrum. Furthermore perform downstream processing of data, such as peak / valley search or smoothing, directly on board or with the optional Halo UV Dtective software. Dual Lump Advintuge By vinue of the long life. halogen tungsten and deuterium lamps, the Halo DB 20s wavelength range is an extensive 190nm - l.lOOnm. Furthermore, the dual lamp System results in higher accuracy than corresponding xnon lamps. Lamp switdiing is automatic and selectable from a wavelength range of 325nm to 370nm. User Friandly Op驩ration and Information Rich LCD Display The extra large 190mm x 138mm, backlit LCD screen with adjustabte brighmess controt displays a large array of data also in graphies) format. The seamless and chemical rsistant keypad is designed for easy and quick slection of navigation and fonction leatures whilst protecting against any laboratory spills Other unique features inelude the 'G0 TO WL' short eut key to allow direct input of a new wavelength into an existmg measurement Validation Functions To ensure optimum instrument performance, self-diagnosis incorporating s number of parameters and wavelength calibration are automatically initiated upon start-up. Furthermore the Halo DB-20 is equipped with a GLP/GMP feature for analyses requiring validation and auditing Parameters such as wavelength accuracy, wavelength reproducibility. bandpass, baseline flatness. baseline stability and noise level can be ail validatod and the audit report printed. Stand alont or PC Op驩ration The Halo DB-20 is fully equipped and capable of executing ail functions in stand alone mode. Smply connect a standard laser printer for direct printouts of data and graphs For more advanced control. analyses and reporting, the simple slide of a switch places the Halo DB-20 under the direct control of the optional UV Dtective software mstalled on a computer with Windows* XP Pro operating System. On-Board Data Slorage Up to 20 operating programs and up to 10 sets of measurement data can be stored in the flash memory of the Halo DB-20. Programs can easily be recalled. edited and deleted. Furthermore, when in stand alone mode, data (in text format) can be downloaded directly to an external memory suefc via the USB port and transfened for further processing to any computer loaded with commercial spreadsheets (such as Microsoft"' Excel)

6 Rectangular Long-Path Cuvette Holder Designed for low concentration or low absorbance samples > Accommodates 2 x long–path cuvettes (sample and reference sides) > Accepts cuvettes with 6 optical path lengths of: 10,20, 30, 40, 50 & 100 mm > Outer width: 12.5mm Cylindrical Long-Path Cuvette Holder: Designed for low concentration or low absorbance samples using a cylindrical cuvette > Accommodates 2 x long–path cylindrical cuvettes (sample and reference sides) Thermostatic Cuvette Holder Designed for applications requiring incubation and/or maintenance of a sample at a constant temperature >...