WPA (a wholly owned subsidiary of Biochrom Ltd. ). Its product range encompasses colorimeters, photometers, spectrophotometers (both UV and visible), portable and bench top pH and conductivity meters including electrodes and accessories, dissolved oxygen meters and turbidity meters.

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CO7500 Colorimeter
  • Designed with the student user in mind
  • Rugged, protable and easy to use
  • Extremely versatile
  • Rechargeable battery version available
Range Absorbance -0.3A to 1.99A
% Transmission 0 to 199%T
Filters 8 gelatin filters: 440nm, 470nm, 490nm,
520nm, 550nm, 580nm, 590nm, 680nm
Bandwidth 40nm
Repeatability ±0.02A at 1A
Analog Output 0-2V for 0-2A, 0-1.99V for 0-199%T
Digital Output RS232
Cuvette Holder Fixed with drain hole, accept 10mm pathlength cuvettes
or 16mm diameter test tubes
Kinetic Yes
Dimensions 180 x 150 x 60mm
Weight 0.5kg


LIGHTWAVE II UV/Vis Spectrophotometer
  • Novel optics for high energy combined with a xenon source for long lamp lifetime
  • Unique, integral cuvette tray for storage and sample support
  • Wavelength scanning, kinetics and concentration functionality with full graphics display
  • Integrated printer (option)
  • Wireless bluetooth connectivity (option)
  • Simple selection software
Light source Xenon
Optical system Dual channel, Monochromator
Wavelength range 190 - 1100nm
Absorbance range -0.3 - 2.5A
Bandwidth 5nm (3nm for II+ models)
Stray light <0.5%T at 220 & 340nm



S1200 Visable Spectrophotometer
  • Simple menu driven software
  • Stored cell culture OD600 and protein method routines
  • Wavelength scan, kinetics and standard curve functionality with full graphics
  • Comprehensive 99 method storage
  • Grafico PC utility software & cable supplied as standard
Detector Single beam with Diode Array detection
Wavelength range 330-800nm
Bandwidth 7nm
Scan Speed Less than 5 seconds for a full scan
Wavelength Accuracy ±2.0nm
Photometric Reproductibility ±0.002A
Photometric Accuracy ±0.01A
Range -0.3A to 1.999A
Display Graphics LCD
Size 270 x 390 x 180mm (W x D x H)
Output RS232, PC, Serial Printer


Che Scientific Co. (Hong Kong) Ltd.
18/F, Unit D, Roxy Industrial Centre, 58-66 Tai Lin Pai Road, Kwai Chung, Hong Kong.
TEL: +(852) 2481 1323    FAX: +(852) 2418 1302
E-mail: sales@chescientific.com     Website: http://www.chescientific.com