Digital Photo Colorimeter, 400-700 nm Model GSI-066G  The efficient and precise Digital Photo Colorimeter is one of the finest digital photo colorimeters. Digital Photo Colorimeters are available with 8 and 5 filters, respectively. The output is available on a 2 digit red LED display in terms of Optical Density (OD) with an Accuracy of +-0.5% FSD +- 1 digit. High standard glass filters covering the complete visible range from 400-700nm are mounted on a rotating disc. A 6.8V Tungsten Lamp as a light source and a highly sensitive photocell make the instrument rugged, accurate and very economical in maintenance. The Battery-operated models of digital colorimeters are also available.A minimum sample volume of 1 mL is required to carry out the analysis. Provision has been made to switch-on the lamp source only when required, thereby increasing the life of the photo diode. This Digital Photo Colorimeter is extremely useful for quantitative estimation of several chemical substances, including blood chemistries in chemical and clinical laboratories, pharmaceutical industries, medicine plants, water treatment plants, agricultural universities, etc.