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Handheld Photometers

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This instrument is useful for scientific research at all stages, including educational and training purposes as well as scaling-up operations for biomass processing and biotechnology development.

Wavelengths:

  • 8-LED Version: 430, 470, 525, 565, 595, 620, 680, and 750 nm
  • 2-LED Version: 680 and 750 nm


These photometers were developed for laboratory, field and industrial applications at a fraction of the cost - comparable units retail for over $1500. The device does not contain special filters. Each unit contains built-in LEDs with specific wavelengths.

Wavelength (nm) Component or Parameter
430 Chlorophyll-a in the blue region
470 Carotenoids (beta-carotene & astaxanthin)
525 Carotenoids (fucoxanthin)
620 Phycocyanin
680 Chlorophyll-a in the red region
750 Cell concentration (i.e., turbidity)

ET2020 Handheld Photometer Specifications

  • Wavelengths:
    • 8-LED Version: 430, 470, 525, 565, 595, 620, 680, and 750 nm
    • 2-LED Version: 680 and 750 nm
  • Absorbance range: 0.00-2.00
  • Cuvette size: standard 10 mm
  • Measuring time: no more than 30 sec
  • Percent error: no more than 0.5%
  • Indicator: LCD display with bright back light
  • Power supply: 4 AA batteries or 6V AC adapter
  • Dimensions: 9.0 ム4.7 x 2.0 inches (H x W x D, approximate)
  • Weight: 1.3 lbs.
  • User Manual
  • Warranty
  • Czar Salts Website