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    Digital Photoelectric Colorimeters

‘LOBAlife’ Photoelectric Colorimeters Models COL - 20 & COL - 15 are versatile models which can effectively serve both the Chemical and the Clinical groups in fields such as Biochemistry, Agriculture, Veterinary, Dyestuffs & Pharmaceuticals They can measure Percentage Transmittance (%T) and Absorbance (ABS). Improved optics enable measurement with only 1ml solution. A wide range of wavelength, 400 to 700 nm, is covered with the help of 8 optical filters mounted on a turret. Additional features of COL - 15 are measurement of concentration (Cons), K-Factor & accuracy to 3 decimals. The unit accepts 10ml square cuvetts for precise measurement. Measurement can be made with 300 ul in 1ml cuvett or 1ml in 4 ml test tube / cuvette. Facility is provided to use narrow band interference filters (optional) of user's choice for specific application to achieve precise results.
 
COL - 20

  • % T & ABS (O. D.)

  • Sample volume needed is only 1ml in 4 ml
    test tube

  • 3 digit led display.

  • Eight filters on a turret to cover 400-700 nm

  • Hermetically sealed photodiode adds ruggedness
COL - 15

  • % T, ABS, CONC and K-factor

  • Accepts square and round test-tube

  • Sample volume needed is only 300 ul in 1 ml cuvette 1ml in 4 ml cuvette test tube

  • Eight filters on a turret to cover 400-700 nm

  • Facility to drop in a narrow band interface filter for specific applications

  • Hermetically sealed photodiode adds ruggedness

  • Improved optics to minimise operational aberrations

  • Ergonomically laid out controls

  • Soothing 4-digit LCD display
 
SPECIFICATIONS COL -15   COL - 20
Wavelength Range 400-700nm with 8 optical filters. 400nm to 700nm with 8 optical filters.
Filter's peak wavelength 420nm, 440nm, 490nm, 520nm, 420nm, 440nm, 490nm, 520nm,
(typical) 540nm, 570nm, 600nm, 700nm. 540nm, 570nm, 600nm, 700nm.
Measuring Modes %T, ABS, CONC and K-factor. %T & ABS
Photometric Resolution 0.1%T, 0.001 ABS upto 1.999 ABS (O.D.) 1% T & 0.01 in ABS upto 1.99 ABS (O.D.)
Display 4-digit LCD. 3-digit LED.
K-Factor Range Display 0 to 1999.

-
Concentration 0 to 2 times the absorbance

-
setting limit readout (with decimal point removed).

-
Sample Volume (min.) 1ml in 4ml cuvette / Test tube. 1ml in 4ml Test tube.
Sample Holder (i) 10 mm square cuvette.
(ii) 12 mm round flat bottom test-tube.		 12 mm round flat bottom test-tube.
Source 6V, 3W pre-focused lamp. 6V, 0.3A
Detector Hermetically Sealed photodiode. Hermetically Sealed photodiode.
Power 230V ± 10%, 50 Hz. 230V ± 10%, 50 Hz.
Weight 2.5 Kg. (approx.) 2.5 Kg. (approx.)
Optional
Interference filter 500, 546, 578, 630nm etc. typical BW of 10nm.
Sample Volume (min.) 300 ul in 1ml cuvette
 
COL -15 / COL - 20 use 8 fitters with these characteristics.
Filter No Peak (nm) Passband (nm) Colour
1. 420 380-510 Violet
2. 440 400-530 Blue
3. 490 460-540 Blue/Green
4. 520 490-560 Green
5. 540 510-590 Yellow/Green
6. 570 570-590 Yellow
7. 600 570-700 Orange
8. 720 and above 630 and above Red and above

Zero No for COL - 15 : OPEN, No filter. This position is set when an optional Interference Filter is to be used.

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