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Orion Aquafast AQ3700

Portable Colorimeter

The AQ3700 is so advanced that a user can create a custom method and customize the calibration. Up to 14 data points can be used to define a method and ten custom methods can be stored in the colorimeter’s memory. The simple interface steps a user through set-up and measurement.  The AQ3700 accepts round cuvettes with diameters of 13, 16 and 24mm.  A rugged unit, waterproof to IP67 standards, the AQ3700 is the most advanced field portable colorimeter on the market today.


  • Wide range of disinfectants in various formats to broaden our offering to a variety of industries

  • Large graphic display with step-by-step user instructions

  • Automatic countdown to measurement

  • Consistent results from shift to shift

  • Selectable languages of English, French, German, Italian, Spanish, Portuguese (Brazilian), and Polish with other languages uploadable via RJ 45 connection


Technical Specifications:

Display Type



2 full scale  %


±0.005 Abs

Preprogrammed Methods

Up to 90 and 10 user defined programmed methods

Test Method

Preprogrammed with user prompts and feedback, user-favorite list, 10 user defined method locations

Sample Size


Ordering Information:

AQ3700 Colorimeter