YSI 910 COD Colorimeter

The YSI 910 COD colorimeter is a rugged, waterproof, single-parameter instrument for the measurement of COD (chemical oxygen demand).


  • Automatic data storage; 16 data-sets with date and time stamp
  • User-calibration to any government or organizational standard (N.I.S.T. or ISO)
  • IP68 waterproof case; easy to hold or set on benchtop; floats
List Price $721.00
Your Price $684.95
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YSI 910 COD Colorimeter

The YSI 910 COD colorimeter is a rugged, waterproof, single-parameter instrument for the measurement of COD (chemical oxygen demand). The EPA-approved COD test is useful for performing rapid, frequent monitoring of treatment plant efficiency, and results allow quick response to changing conditions in the waste stream while the traditional BOD5 test takes 5 days to determine results.

The instrument features a large, backlit display, a real-time clock, automatic data logging as well as the ability to export data to a PC or printer using the 900 Series Data Hub for infrared data transfer.


  • Automatic data storage; 16 data sets with date and time stamp
  • Large, backlit LCD display
  • IP68 waterproof case; easy to hold or set on benchtops and floats
  • Innovative light shield prevents moving parts or separate pieces that can easily be broken or lost
  • User calibration to any government or organizational standard (for example N.I.S.T. or ISO)
  • Resolution can be improved for specific range requirements
  • Known interferences can be adjusted for the sample
  • Auto shutoff extends battery life


  • Power Supply: 4 alkaline AAA batteries; approximately 17 continuous hours or 5,000 tests
  • Auto Shutoff: 20 minutes after last key press; audible signal
  • Operating Range: 5° to 40°C (41° to 104°F); 30-90% relative humidity
  • Display: Backlit LCD
  • Memory Capacity: 16 data sets with date and time stamp; automatic
  • Weight: 260 g (0.5 lbs)
  • Dimensions: 15.9 L x 7.6 W x 3.8 H cm (6.1 L x 3 W x 1.5 H in)
  • Interfaces: Infrared interface with the 900 Series Data Hub (optional) for data transfer
  • Operation: Acid/solvent resistant case; touch-sensitive keypad with audible feedback; factory calibrated; user calibration possible; reset to factory cal
  • Certifications: CE; IP68 waterproof rating (1 hour at 0.1 meter); floats
  • Colorimetric Resolution: 0.01 A (absorbance)
  • Photometric Accuracy: 3% FS (T = 20° to 25°C) (68° to 77°F)
  • Wavelength Accuracy: ±1 nm
  • Warranty: 1 year
  • Optics: LEDs, 2 interference filters (IF) and photo sensor in a transparent chamber. Interference filters are range dependent.
  • Wavelength Range: 430 nm IF Δ λ = 5 nm for range 0 to 150 mg/L; 610 nm IF Δ λ = 5 nm for ranges 0 to 1,500 mg/L and 0 to 15,000 mg/L
  • (1) 910 COD colorimeter
  • (1) Hard-sided carrying case
Questions & Answers
Can this meter be used in the field to determine COD in stormwater quickly?
While this is a COD meter that can measure chemical oxygen demand quicker than traditional methods, the samples require digestion using thermoreactors like the YSI CR2200, before they can be read. 
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