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910 COD Colorimeter

Product Recycling Recycling

Waterproof, accurate, easy to use colorimeter

The YSI 910 COD colorimeter is ideal for any application. This portable instrument allows you to easily take readings for COD.

COD Colorimeter, YSI Model 910 COD Colorimeter
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YSI Colorimeter Products Intro Webinar from YSI

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YSI has Authorized Distributors all over the globe. View a map and find your closest contact for YSI 910 COD Colorimeter products and accessories.

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Have a question about your YSI 910 COD Colorimeter? Check out the support page with resources compiled just for you.

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Want to return a product for service? Here you'll find authorized service centers and instructions on how to send in your YSI 910 COD Colorimeter.

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The 910 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.

Interested in a COD meter? Learn about the trade in program currently going on (U.S. only).  Or, if you prefer to buy from one of our dealers, take advantage of our rebate program!

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.

Features for the 910 to quickly and accurately measure COD include:

  • Automatic data storage; 16 data-sets with date and time stamp
  • Large, backlit LCD display
  • IP68 waterproof case; easy to hold or set on benchtop; 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
  • 2-year warranty

YSI offers a COD empty vial disposal program as well through Safety-Kleen.  Click on the "Resources" tab and look under "Tips, FAQs & Guides" to learn more or simply fill out the form on Safety-Kleen's website.

If you are interested in measuring multiple parameters or chlorine only, then you may be interested in the YSI pHotoFlex colorimeters or the YSI 900 chlorine.

Related Products

Chlorine Testing - YSI 900 Chlorine Colorimeter

900 Chlorine Colorimeter
Multiparameter Colorimeter - YSI pHotoFlex STD

pHotoFlex Colorimeters




YSI 910 Instrument General Specifications

Photometric Accuracy 3% FS (T=20° to 25°C) (68° to 77°F)
Wavelength Accuracy ±1 nm
Dimensions Size 15.5 length x 7.5 width x 3.8 cm height (6.1 x 3 x 1.5 in)
Weight 260 g (0.5 lbs)
Display Backlit LCD
Colorimetric Resolution 0.01 A (absorbance)
Operating Range 5° to 40°C (41° to 104°F); 30-90% relative humidity
Power 4 alkaline AAA batteries; approximately 17 continuous hours or 5,000 tests
Auto Shutoff 20 minutes after last key press; audible signal
Memory Capacity 16 data sets with date and time stamp; automatic
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 (1 hour at 0.1 meter); floats

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

Warranty 2-year instrument

YSI 910 Instrument Technical Specifications

COD Low Range Range 0 to 150 mg/L
Method Dichromate/H2SO4
λ 430
COD Mid Range Range 0 to 1,500 mg/L
Method Dichromate/H2SO4
λ 610
COD High Range Range 0 to 15,000 mg/L
Method Dichromate/H2SO4
λ 610

Ordering Guide

Part Number Description Range
250910Y Model 910 colorimeter for COD
251990Y COD, Low Range, vials, pack of 25 0 to 150 mg/L
251990LPY COD, Low Range, vials, pack of 150 0 to 150 mg/L
251991Y COD, High Range, vials, pack of 25 0 to 1,500 mg/L
251991LPY COD, High Range, vials, pack of 150 0 to 1,500 mg/L
251992Y COD, High Range Plus, vials, pack of 25 0 to 15,000 mg/L
251992LPY COD, High Range Plus, vials, pack of 150 0 to 15,000 mg/L
251984Y COD, High Range Plus, vials, Hg Free, pack of 25 0 to 15,000 mg/L
251985Y COD, High Range, vials, Hg Free, pack of 25 0 to 1,500 mg/L
251986Y COD, Low Range, vials, Hg Free, pack of 25 0 to 150 mg/L

CR2200 Thermoreactor for COD and thermal digestions; up to 12 vials; 3 reactor temperatures and 8 fixed programs; 115 V

1P22-2Y CR3200 Thermoreactor for COD and thermal digestions; up to 24 reaction vials; selectable temperatures and 8 fixed/8 user defined programs; 115 V

CR4200 Thermoreactor for COD and thermal digestions; 2 x 12 reaction vials; selectable temperatures and 8 fixed/8 user defined programs; 2 different temperature blocks; 115 V

200900Y 900 Series Data Hub for Infrared Data Transfer


910 COD Colorimeter Manual

Tips, FAQs & Guides

YSI Photometer Reagents Shelf Life

YSI COD Vial Disposal Program

Specification Sheets

YSI 910 COD Colorimeter

Catalogs & Brochures

YSI Colorimetry Catalog

Water Quality Sampling for Field and Laboratory

Wastewater - Water Quality Capabilities & Solutions

News Briefs

YSI Trade In Promo 2013 for Lab and Colorimeters

MultiLab and Colorimetry Rebate Program 2013


Archived Webinar:
Understanding the New Colorimeter Product Line

Original Broadcast: March 14th, 2013 —2:30 - 3:00 PM EST

The single parameter colorimeters measure Free/Total Chlorine or COD while the multiparameter colorimeters measure from 85 to 138 parameters (depending on model).

Our full line of reagents can also be used in the YSI products or in other branded instruments. We will discuss this as well!



YSI Colorimeter Reagents - COD

Reagents for measuring COD

YSI 2200 COD Thermoreactor

YSI CR 2200 COD Thermoreactor

COD thermoreactor for up to 12 test tubes

YSI 3200 COD Thermoreactor

YSI CR 3200 COD Thermoreactor

COD thermoreactor for up to 24 test tubes

YSI 4200 COD Thermoreactor

YSI CR 4200 COD Thermoreactor

COD thermoreactor for up to 2 different temperature blocks with 12 test tubes each





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