COLORIMETER - CL 157 - ELICO - Used Laboratory Equipment and New Lab Instrument Supplies, UK

COLORIMETER - CL 157 - ELICO

ELICO's 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 colorimeter 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.
Principle of Operation

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

Colorimeter Applications

In determination of concentration of constituents in:
Clinical, Pharmaceutical, Food, Beverage & Water Analysis Analytical & Agricultural Chemistry
Metallurgy.

Colorimeter Features

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

Colorimeter Specifications

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

Detector
Photo diode

Readout
2 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 the Colorimeter
Matched 3 mL test tubes, holder for 10mm path length glass cuvettes disposable cells

At Extra cost
Glass cuvettes & disposable cells

The Elico CL 157 Calorimeter are manufactured to ISO 9001 standard and are CE approved. All equipment is Brand New and comes complete with operating manual and a 1 year guarantee.