In water-quality testing, precision, speed and repeatability define success for wastewater and water operators. Hach’s DR3900 Laboratory VIS Spectrophotometer delivers on all three, helping laboratories streamline daily testing while improving data integrity and operator efficiency. The best spectrophotometer is one that’s versatile and able to test hundreds of parameters, all while remaining user friendly to operate.
Designed for operators
The DR3900 is built for the realities of the plant environment. It’s a visible-range spectrophotometer (320-1,100 nanometers) designed to deliver quick, accurate readings without complicated setup. With built-in RFID technology, automatic method recognition and over 220 preprogrammed Hach methods, it virtually eliminates manual test selection and data entry, which saves operators valuable time and minimizes mistakes.
Just insert a vial and the instrument automatically identifies the test, applies the correct calibration curve and tracks the lot number and expiration data. Every result is logged with sample ID, operator name and time stamp, which is ideal for facilities that need complete traceability and audit-ready reporting.
Smarter workflow, consistent results
For many operators, repeatability and reliability are just as important as speed. The DR3900’s intelligent averaging feature screens out anomalies from scratched or dirty vials, ensuring each reading reflects true sample values. That consistency means fewer reruns and more confidence in your results, whether you’re testing for ammonia, nitrate, phosphate, COD or chlorine.
With wavelength accuracy within ±1.5 nanometers and photometric repeatability within ±0.003 absorbance units, the DR3900 delivers the dependability that treatment professionals expect from Hach instrumentation. “It’s performance you can trust, day after day, test after test,” says a company spokesperson.
Choosing the right chemistries
Pairing the DR3900 with Hach TNTplus vial tests unlocks its full potential. TNTplus chemistries feature automatic method detection, precise reagent dosing, and clean optical design for highly repeatable results. They reduce handling steps, minimize chemical exposure and can save hours of testing time each week.
Foolproof your pairings with Hach’s Compatibility Guide. This guide provides detailed information on which reagents, instruments and test methods are compatible with each other so users can select the appropriate combinations for their specific needs. Simplifying the selection process can help streamline workflows, avoid errors, and achieve reliable results.
Available through Core & Main
Core & Main partners with Hach to make advanced water-quality testing more accessible to labs and facilities nationwide. You can purchase the Hach DR3900, TNTplus chemistries and a wide range of additional Hach instruments and accessories directly through Core & Main.
Stretch your budget further, save time, and stay in compliance by taking 15% off the DR3900 and DR6000 when you purchase two or more boxes of TNTplus vials using code TNT2025. Visit supply.coreandmain.com to explore product lines and simplify how you equip your lab. “With Core & Main’s trusted service and Hach’s proven performance, it’s never been easier to ensure accuracy, efficiency and peace of mind with every test.”
Core & Main is a leading specialized distributor of water, wastewater, storm drainage and fire protection products, and related services. Core & Main Supply is your one-stop shop for water and wastewater treatment products in the plant, lab and field. The company is dedicated to providing convenient and fast access to thousands of items from brands you trust, with in-stock items shipped directly to your facility.
