What can this measure for? Looking for a list of all possible compounds/analytes.

these are the parameters which can be measured, Aluminum Ammonia Barium Benzotriazole / Tolyltriazole Boron Bromine Chlorine Dioxide Chlorine, Free Chlorine, Total Chromium, Hexavalent Chromium, Total COD (Chemical Oxygen Demand) Color Copper Cyanide Cyanuric Acid Detergents / Surfactants Dissolved Oxygen Fluoride Hardness Hydrazine Hydrogen Peroxide Iron Manganese Molybdenum Monochloramine Nickel Nitrate Nitrite Nitrogen, Total Nitrogen, Total Inorganic (TIN) Oxygen Scavengers Ozone pH Phosphonates Phosphorus Potassium Silica Sulfate Sulfide / Hydrogen Sulfide Suspended Solids Tannin and Lignin TKN Total Organic Carbon (TOC) Toxicity Turbidity Volatile Acids Zinc

I wish to purchase to cod vial adapter for this unit but I am not seeing it here. Is there anyway you can give the amazon item number so I may buy

The COD vial adaptor should be included when purchasing the DR900 (PN 9385100), but if you wanted to purchase another one separately the part number for the adaptor is 4846400.

Will this test for manganese?

yes sir, for Manganese determination you can chose one of two methods. Hach method 8034 Powder Pillows Periodate Oxidation , range 0.1 - 20.0 mg/L Mn hach method 8149 Powder Pillows PAN Method, range 0.006 - 0.700 mg/L Mn if you need any help with selecting ragents , sample preparation or methods , please feel free to contact our customer service

Does this device also test conductivity and TDS (total dissolved solids)?

The DR900 does not test for conductivity or TDS. The full list of tests that come stored on the DR900 can be located by pulling up the following link in your browser. https://www.hach.com/dr900-multiparameter-portable-colorimeter/product-parameter-reagent?id=15684103251&callback=qs Thank you, Hach technical support

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💧 Master water quality on the go — precision meets portability!

PORTABLE PRECISION - Compact, lightweight design lets you test water quality anytime, anywhere.
BUILT FOR THE FIELD - Rugged, waterproof, dustproof, and shock-resistant design ensures reliability anywhere.
EFFORTLESS OPERATION - Intuitive interface with quick method selection reduces errors and saves time.
SEAMLESS DATA MANAGEMENT - Store up to 500 results and export via USB for audit-ready compliance.
COMPREHENSIVE WATER ANALYSIS - Accurately measure over 90 methods across 48 parameters for total control.

The Hach DR 900 is a rugged handheld colorimeter offering precise water testing with over 90 colorimetric parameters. Designed for professionals, it combines waterproof and shock-resistant durability with a user-friendly interface, compact portability, and seamless USB data transfer, making it the ultimate tool for reliable, on-site water analysis and compliance.