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Helios Beta UV-Vis-NIR single beam spectrometer. System is in excellent condition and includes the 7 cell rotary changer, manual, and power cord. System has been fully tested for wavelength accuracy and stability. System has a floppy drive to transfer files in CSV format and an RS232 serial port. Wavelength range: 190-1100nm, accuracy +/- 1 nm, absorbance accuracy: +/-.005 A @1 A, stability <.002 A/hr. Store up to 30 methods, calibrations, or results files in non-volatile memory. Electrical requirements 100/240 V 50/60 Hz, Dimensions 455 x 395 x 215 mm; (18 x 15.5 x 8.5"), weight: 10 kg (22 lbs).