"• US EPA-approved COD test method • Premeasured COD reagents cover three test ranges• 430 nm single-wavelength colorimeter is specific to COD testing• Digest up to 24 samples simultaneously with thermal reactor Testing requires the purchase of all three components: a COD colorimeter, a thermal reactor, and COD test reagents. YSI 910 COD Colorimeter<\/b> is set up to directly read the values for the three ranges of COD testing. Meter features IP68-rated waterproof housing, large backlit display, real-time clock, and 16-data set automatic data storage. User calibration possible."