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Atomic Absorption Spectrophotometer, Double Beam Atomic Absorption Spectrophotometer, Single Beam Atomic Absorption Spectrophotometer, NIR Spectrophotometer, Spectrofluorometer, Bio - Spectrophotometer, Double Beam UV-VIS spectrophotometer, Single Beam UV-VIS Spectrophotometer, UV-VIS Spectrophotometer, Scanning Visible Spectrophotometer, Visible Spectrophotometer, Fluorometer, Colorimeter

Spectroscopy - Colorimeter

	Stable, Direct Readout of Absorbance
	Compact & Easy to operate
	Rugged, Sturdy & Reliable
	Thumb Wheel Selection of Filters
	Pre-focussed Light Source
	Long Life Photo Diode Detector
	Only 1 ml of Sample need
	Usable for Disposable cells

Colorimeter Application In determination of concentration of constituents in
- Clinical, Pharmaceutical, Food, Beverage & Water Analysis
- Analytical & Agricultural Chemistry
- Metallurgy

Colorimeter Operation Principle

When light, of comparatively narrow range of wavelengths in the visible spectrum,is passed through a homogeneous medium, a part of the light is reflected, a part is absorbed within the medium and remainder is transmitted. The intensity of the light emerging from the medium decreases exponentially as the concentration and thickness of the absorbing medium increase arithmetically, as per laws of Beer & Lambert. If the container and the thickness of the medium is kept constant, the intensity of light emerging out of the medium, with respect to the incident light, is directly proportional to the concentration of the medium.

With this principle, in colorimetry, the concentration of a coloured solution is determined by measurement of relative absorption of light with respect to a solution of known concentration

This COLORIMETER CL 157 is a table top, ergonomically engineered instrument with its components and modules inside and controls, readouts, etc., on the panels outside laid out for ease of operation and maintainability

Light from pre-focussed tungsten filament lamp is focussed by a lens system on to a photocell through filters, of discrete bands of overlapping wavelengths covering the visible spectrum, selectable by a filter wheel, and a test tube/cell containing solution under investigation. The electrical output of a photo diode is processed and the value of absorbance displayed on the readout

The instrument is incorporated with facilities to adjust the intensity of light, appropriate for the expected concentration of the sample, by aperture control and prevention of exposure of photocell to the light, when measurement is not being carried out, by use of a shutter.

Photometric
Range	-0.1 to 1.99 Abs
Repeatability	± 0.01 Abs
Stability	± 0.01 Abs in 8 h
Light Source	Tungsten Lamp
Filters (8)	Peak Transmission at 450, 470, 490, 520, 540, 570, 600 & 670 nm
Shutter	To prevent the detector from continuous exposure to light
	Photo diode
Readout	2½ Digit 7 segment LED display of 12.7mm height
Power Requirement	230 V ± 10%, 50 Hz, 1 , Max. 20VA
Physical Dimensions
Size (WxDxH) in mm	270 x 180 x 110
Weight in Kg.	Approx. 3.0
Accessories Supplied
With Instrument	Matched 3 mL test tubes, holder for 10mm path length glass cuvettes disposable cells
At Extra cost	Glass cuvettes & disposable cells
Specifications subject to change due to continuous development