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YSI 900 Chlorine Colorimeter

YSI 900 Chlorine Colorimeter

YSI pHotoFlex Colorimeters

YSI pHotoFlex Colorimeters

YSI 910 COD Colorimeter

Waterproof, accurate, easy to use colorimeter.


This rugged, waterproof, single parameter colorimeter for COD (chemical oxygen demand) in three different ranges is ideal for laboratory and field testing.

The 910 instrument features a large, backlit display, a real time clock, automatic data logging as well as the ability to export data to a computer or printer using the 900 Series Data Hub for infrared data transfer.

• Quickly, easily and accurately measure COD
• Automatic Data Storage; 16-data sets with date and time stamp. Export data with the 900 Series Data Hub infrared data transfer.
• Large, easy to read backlit LCD display
• IP68 waterproof case; easy to hold or set on a benchtop
• Factory calibrated; User-calibration possible
• Resolution can be improved for specific range requirements
• Hg-free reagents also available
• 2-year warranty

Model 910 COD Colorimeter, includes: manual, instrument, carrying case, batteries, screw driver, 3 ml syringe and 1 ml syringe.

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: 15.5 L x 7.5 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: 2 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