Hach DR3900 Laboratory VIS Spectrophotometer

The Hach DR 3900 is a benchtop visible spectrum, split beam spectrophotometer for laboratory water analysis.


  • Simple Preparation with TNTplus® vials
  • Store hundreds of user-determined methods
  • Claros™ connectivity
Starting At $6,750.00
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The Hach DR 3900 is a benchtop visible spectrum (320-1100 nm) split beam spectrophotometer with over 220 pre-programmed methods optimized for laboratory water analysis. The DR3900 spectrophotometer is optimized for safe processes and accurate results daily. Control parameters like Ammonium, COD, Phosphate, Nitrate and many others are easy to test.

Simple Preparation
NTplus® vials use Dosicaps - freeze-dried reagents integrated into a sealed cap - that are easier to use than Powder Pillows or Liquid Reagents, without any risk of contamination. The boxes and vials are color-coded for fast and easy parameter and range recognition of the test needed. Step-by-step illustrated test methods are printed on the box as a quick reference and can also be called up in the instrument menu.

Comprehensive Documentation
Measurement results are documented on a detailed level with a timestamp, operator ID, absorbance reading, and calculated concentration. The 2D barcode delivers the lot number and expiry date, logged with every result. For accreditation, the certificate of analysis can be called up just by wiping the reagent box towards the RFID sensor.

Fast Execution
The Hach DR 3900 spectrophotometer automatically reads a 2D barcode on the TNTplus vial to identify the appropriate method and take the measurement. The vial spins to take 10-fold absorbance readings that will be averaged for result determination to exclude scratches and fingerprints. Instrument calibration verification and high instrument stability all combine to eliminate the need to run reagent blanks.

With the ability to store hundreds of user-determined methods, operators are able to tailor the DR 3900 to meet the everyday needs of the facility. Optimizing and customizing the method portfolio, combined with regular software updates and Claros™ connectivity, makes the DR3900 the ultimate solution to water quality lab needs.

  • Beam Height: 10 mm
  • Data Logger: 2000 measured values (Result, Date, Time, Sample ID, User ID)
  • Display: 7" TFT
  • Display Resolution: WVGA (800 pix x 480 pix)
  • Display Size: 7 inch (17.8 cm)
  • Display Type: Colored touch-screen
  • Enclosure Rating: IP30
  • Interfaces: USB type A, (2)USB type B, Ethernet, RFID module
  • Light Source: Gas-filled Tungsten (visible)
  • Manual Languages: English, French (CDN), Spanish (SA), Portuguese (BR),Chinese, Japanese, Korean
  • Max. operating humidity: 80 %
  • Max. Storage Humidity: 80 %
  • Operating Conditions: 10 - 40 °C
  • Operating Mode: Transmittance (%), Absorbance and Concentration, Scanning
  • Optical System: Reference beam, spectral
  • Photometric Accuracy: 5 mAbs @ 0.0 - 0.5 Abs
  • Photometric Accuracy 2: 1 % at 0.50 - 2.0 Abs
  • Photometric Linearity: < 0.5 % - 2 Abs
  • Photometric Linearity 2: ≤ 0.01 % at >2 Abs with neutral glass at 546 nm
  • Photometric Measuring Range: ± 3.0 Abs (wavelength range 340 - 900 nm)
  • Power Requirements: With external power supply
  • Power Requirements (Hz): 50/60 Hz
  • Power Requirements (Voltage): 110 - 240 V AC
  • Power Supply: Benchtop Power Supply
  • Preprogrammed Methods: > 240
  • Region: US
  • Sample Cell Compatibility: Rectangular: 10, 20, 30, 50 mm, 1 inch; round: 13 mm, 16 mm, 1 inch
  • Scanning Speed: > 8 nm/S (in steps of 1 nm)
  • Source Lamp: Gas-filled Tungsten (visible)
  • Specific Technology: RFID for easy method update, sample ID and Certificate of Analysis
  • Spectral Bandwidth: 5 nm ± 1 nm
  • Standard accessories: None
  • Storage Conditions: -30 - 60 °C
  • Stray Light: < 0.1 % T at 340 nm with NaNO2
  • User Interface Languages: Bulgarian, Chinese, Croatian, Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Polish, Portuguese - Brasilian, Potuguese, Russian, Serbian, Slovakian, Slowenian, Spanish, Swedish, Turkish
  • User Programs: 100
  • Warranty: 12 months
  • Wavelength Accuracy: ± 1.5 nm (wavelength range 340 - 900 nm)
  • Wavelength Calibration: Automatic
  • Wavelength Range: 320 - 1100 nm
  • Wavelength Reproducibility: ± 0.1 nm
  • Wavelength Resolution: 1 nm
  • Wavelength Selection: Automatic, based on method selection
  • Weight: 4.2 kg
  • (1) DR3900 Spectrophotometer
  • (1) Adapter A for 1 in. round and 1 cm square cells
  • (1) Matched pair of 1 in. square glass sample cells
  • (1) Light shield
  • (1) Dust cover
  • (1) Printed basic user manual
  • (1) Benchtop power supply with 115 and 230V power cords
Questions & Answers
What is the procedure for phosphate testing using the high range reactive phosphate 0 - 100mg/l reagent set (SKU 2767345)?
The Hach DR3900 can measure high-range phosphates in water samples using the reagent set and the Molybdovanadate Test 'N Tube™ Method (Hach Method 8114), found in the documents tab on the reagent product page.
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