Thermo Orion AQ3700 Colorimeter

The Thermo Orion AQ3700 Colorimeter has over 90 pre-programmed methods for common test parameters with an automatic selection of 6 LED wavelengths and countdown timer.


  • Six wavelengths generated by long life LEDs
  • Easy to read graphical display
  • IP67 waterproof
List Price $1,550.00
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The Thermo Orion AQ3700 Colorimeter has over 90 pre-programmed methods for common test parameters with an automatic selection of 6 LED wavelengths and countdown timer. There are six wavelengths generated by the long life LEDs in the meter. Thermo Orion AQ3700 Colorimeter
has a graphical display that is easy to understand and can be used in English, Spanish, German, French, or Italian.

The Thermo Orion AQ3700 Colorimeter testing methods include total nitrogen and total phosphate nutrient testing or create up to 10 custom methods using 2-14 standards and blank.


  • Wastewater
  • Drinking water
  • Nutrient monitoring
  • Environmental testing
  • Food and Beverage
  • Industrial Applications
  • Incident Light Source: 6 Light Emitting Diodes (LED)
  • Wavelengths: 430, 530, 560, 580, 610, 660 nm
  • Photometric Precision: 2% full scale as measured with standard solutions
  • Photometric Resolution: +/-0.005 Abs
  • Test Methods: Pre-programmed with user prompts and feedback, user's favorite list
  • Autoranging: Yes
  • Blank Capacity: Per method
  • Test Reagent Formats: Powder, tablet, liquid, reagent tubes, acid digestion tubes
  • Datalog Points: Up to 1000, time and date stamp
  • New Method Upload Capability: Yes, via internal RJ45 port
  • Display: Backlit, graphic display
  • Inputs: 12 button numeric keypad, plus 3 function keys
  • Sample Required: 10mL
  • Sample Cells Accepted: 24mm samples vials (adapter for 13mm & 16mm vials)
  • Outputs: IRDA (adapter required)
  • Auto Shut Down: 20 min after last key-press, wakes to last location
  • Power: 4 AA batteries (approx. 3000 tests)
  • Regulatory and Safety: CE
  • Operating Temp: 5 - 40 C (30 to 90% non-condensing at 30 C)
  • Meter Waterproof Rating: IP67
  • Warranty: 2 years
  • (1) AQ3700 Colorimeter
  • (4) AA batteries
  • (4) 24mm vials
  • (1) 24mm vial adapter
  • (3) 16mm vials
  • (1) 16mm vial adapter
  • (1) Carrying case
  • (1) Stir rod and brush
  • (1) User guide with test methods
Questions & Answers
Does my colorimeter feature auto shutdown?
Yes, twenty minutes after last key-press the colorimeter will shut down. The meter will emit a warning beep 30 seconds before it turns off. Any key can be pressed to prevent shut down. If the instrument is working, the automatic shutdown feature is placed on hold.
What size sample is required?
A 10mL sample is required for the AQ3700 Colorimeter.
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