HO-ED-TH-01 Spectrophotometer

Spectrophotometer Holmarc's Spectrophotometer (Model No: HOED- TH-01) is ideal for education, research and industrial applications. Unlike other entry level spectrophotometers, it employs the classic Czerny - Turner monochromator design, which ensures low stray light. It uses 1200 lines/mm blazed holographic grating as the dispersion element providing high wavelength resolution. It also employs a sigma delta ADC of 16 bit resolution for photometric measurements. A graphic LCD screen is used to plot an absorbance v/s wavelength graph. The data can then be analyzed for peaks and valleys. The spectrophotometer can measure the amount of absorbance or lack of absorbance of different colored light for a given molecule. The absorbance spectrum is a graph of a sample's absorbance at different wavelengths. In a spectrophotometer, the amount of light passing through the sample cell is measured by a photometer. The photometer delivers a voltage signal to a processing unit. The signal changes as the amount of light absorbed by the liquid changes. According to Beer's law, the amount of light absorbed by a medium is proportional to the concentration of the absorbing material or solute present. Thus the concentration of a colored solute in a solution can be determined in the lab by measuring the absorbance of light at a given wavelength. Experiment:    To study the absorbance and transmittance of different samples at different wavelengths    To plot the graph of absorbance Vs. wave length Specifications:   Wavelength     Range     380 - 1100 nm     Resolution     1 nm     Accuracy     ± 1 nm     Bandwidth     2 nm     Concentration     Range     0 to 999     Selectable resolution     1,0.1,0.01 or 0.001     Readout     320 x 240 Pixels graphics LCD     PC Interface     RS232 (optional)     Light source     Tungsten halogen lamp 20 W     Transmittance     Range     0 to 100 %     Resolution     0.1 %     Accuracy     ± 1 %     Noise levels     < 1 %     Stability     ± 1% / Hr after warm-up     Absorbance     Range     0 to 2 A     Resolution     0.001 A Features:    Compact and easy to use     LCD display is large enough to read from any distance     Selectable resolutions Schematic: