Description Spectrophotometer ideal for working in the visible range of spectrum in those applications and routine testing in universities and schools. With manual control to adjust the wavelength and easy to read digital display, is made of high quality materials that make it an accurate and reliable instrument. FEATURES: Components of high quality and precise design. Manual adjustment of wavelength. Silicon photodiode detector high quality grating 1200 lines / mm ensure high accuracy and precision. Digital display for easy reading. Black and auto zero easy to implement. Pressing a single button mode selection allows transmittance, absorbance and calculation of concentrations. RS232 output for direct transmission of data to a computer or printer. Windows ® based software that allows computer applications to increase the calculation of curves through the RS232 port. Large sample compartment that can hold trays of 5-100 mm light path with the appropriate adapters (optional). Design that ensures a convenient lamp replacement for the user. SPECIFICATIONS: Reference 052-54201020 052-54201050 Model 4201/20 4201/50 Optical-system! Single beam, grating 1200 líneas/mm Single beam, grating 1200 lines / mm   Long range. Wave 325-1000 nm 200-1000 nm Bandwidth 5 nm 6 nm Accuracy long. Wave ± 2 nm ± 2 nm Long resolution. Wave 1 nm 2 nm Selecting long. Wave Manual Auto Photometric mode "! T, A, E T, A, E   Photometric range -0,097 To 1,999 A, 0 to 125% T -0,097 To 1,999 A, 0 to 125% T Photometric Accuracy ± 0.5% T ± 0.5% T Photometric-resolution! ± 0.3% T ± 0.3% T   Diffuse-light! 0.5% T 0.5% T   Stability ± 0.004 A / h to 500 nm ± 0.004 A / h to 500 nm Light-source! Tungsten lamp Tungsten lamp   -Detector! Silicon photodiode! Silicon photodiode     -Cell holder! For 4 cells of 10 mm For 4 cells of 10 mm   Sub-samples! Standard 10 mm cuvette light path "! Standard 10 mm cuvette pathlength     Output RS-232 RS-233 port Screen LCD, 3.5 bits LCD, 3.5 bits Food AC 220 V / 50 Hz AC 220 V / 50 Hz Size 480x360x160 mm 480x360x160 mm Weight 8 Kg 9 Kg