Biochrom WPA range of Colorimeters & Spectrophotometers

Biochrom WPA CO7000 Medical Colorimeter

Biochrom WPA CO7000 Medical Colorimeter


  • Single beam filter based spectrophotometer/colorimeter covering 400 to 700 nm
  • Fully tropicalised and portable for field use.
  • Low cost instrument
  • Easy three button operation: 
  • Rechargeable battery

The Biochrom WPA CO7000 is a portable colorimeter designed for use by doctors and medical technologists in small and medium sized clinics.

Ideal for tropical and field conditions
The unit has been tropicalised to protect it in hot and humid conditions (to 45°C and 70%, respectively); the 10 gelatin filters are encased in glass to prevent fungal growths appearing and the PCB has been conformally coated so that individual components are sealed to prevent corrosion. The instrument is powered by an internal rechargeable NiMH battery or by external power allowing it to be used where the power supply could be unreliable. Using the instrument connected to the mains electricity supply automatically recharges the battery.

Easy to use and clean
The CO7000 is very easy to use as there are only three buttons (On/Off, Reference and Test). The wavelength required is selected by rotating an integral filter wheel. The filters are at 400, 440, 470, 490, 520, 550, 580, 590, 680 and 700nm enabling assays in the wavelength range 400 to 700 nm to be measured.There is a drain hole at the bottom of the cell compartment so that spillages do not affect the instrument. There is no serial port on the CO7000, therefore it cannot be connected to a printer.

Ideal for biochemical colorimetric analysis
The instrument has been designed as an “open” system so that test kits for clinical and medical applications from virtually any supplier can be used. Examples of routine assays that can be measured in serum and plasma include Albumin, Cholesterol, Glucose, Creatinine, Total Protein, Haemoglobin, Urea and those in cerebrospinal fluid include Glucose and Total Protein. The samples can be measured in either standard 10mm pathlength cuvettes (a minimum of 400µl is required) or in 10/12/16mm diameter test tubes (adapters are included with the instrument). 


Ordering Information Order Code
Biochrom WPA CO7000 Colorwave Medical Colorimeter (includes rechargeable battery & test tube adaptors) 80-3000-42

Spare Parts
80-3000-55  Spare lamp, CO7000L
80-3000-56  Spare filter set, CO7000F
80-2004-53  Disposable methacrylate cells, 10mm pathlength, volume 2.5ml, pack of 100
80-2084-11  Disposable polystyrene cells, 10mm pathlength, volume 2.5ml, pack of 100
80-3000-57  Adapter set for 10 and 12mm tubes

Technical specifications are shown below. Optional accessories marked *

**Useful References
"District Laboratory Practice in Tropical Countries Parts 1 and 2"  2nd Edition 2005 by Monica Cheesbrough published by Cambridge University Press

Technical Specifications
Specification Data
Type Visible 
Wavelength Range 400 - 700nm 
Wavelength Accuracy (+/-) n/a 
Wavelength Reproducibility (+/-) n/a 
Lamp Source Tungsten Halogen 
Beam Single Beam 
Optical System Filters 
Bandwidth 40nm 
Detector Diode 
Photometric Range -0.3 to 1.99A 
Photometric Accuracy <+/- 0.05A at 1A using neutral density filters 
Photometric Reproducibility 0.02A at 1A in 10mm cuvette 
Photometric Reproducibility 0.02A at 1A in 10mm cuvette 
Stray Light <1%T at filter wavelength 
Stability n/a 
Measurement Type Fixed Wavelength (Abs/%T) 
Cell Compatibility Cuvette 10mm 
Other Sample Containers Test tube (10,12,16mm) included 
Cell Holder Single Cell 
Accessory Options Rechargeable battery and test tube adaptors included, serial printer* 
Method Storage n/a 
Compliance CE 
Data Output Print* 
Display LCD 
Data Interface n/a 
Languages English, Manuals in French, German, Italian and Spanish 
Power Requirement 110-220V, 50/60Hz, 20VA 
Weight 0.6 Kg (1.2lb) 
Dimensions (WxDxH) 15 x 18 x 6cm (5.9 x 7.1 x 2.4 inches) 
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