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AQ3140 COD Colorimeter

Applications :

  • Wastewater
  • Food & beverage
  • Aquaculture
  • Agriculture

The Thermo Scientific™ Orion™ AQUAfast™ AQ3140 COD colorimeter is a single parameter instrument for determining chemical oxygen demand in water. This colorimeter is designed to give accurate, reproducible results by offering features such as large digital backlit display, automatic switch-off, user friendly keypad, real time clock and date, calibration mode, storage function, waterproof sample chamber, and many more! The AQUAfast AQ3140 COD colorimeter is used in markets such as wastewater, food & beverage, aquaculture, and agriculture.



  • Large digital backlit display
  • Automatic switch-off
  • User-friendly keypad
  • Real-time clock and date
  • Calibration mode
  • Storage function
  • Waterproof sample chamber
  • Angled, ergonomic design for easy bench top or hand-held use


Accuracy 3% Full Scale (T = 20-25°C)
Auto Shut Down Time 10 minutes after last keypress
Backlight Option Yes
Battery Life 17 hours operating time or 5,000 measurements in continuous mode when display backlight is off
Battery Type 4 AAA
Description AQUAfast AQ3140 COD Colorimeter
Display Type Backlit LCD
Incident Light Source 2 Light Emitting Diodes (LEDs)
LED Wavelengths 430nm, 610nm
Test Reagent Formats Digestion tubes
Weight (Metric) 260 grams (includes batteries)
Warranty 2 years
Includes Colorimeter with field case, batteries and literature
Waterproof Rating IP67
Certifications/Compliance CE
Calibration User and factory calibration functions
Data Storage 16 with date/time stamp
For Use With (Equipment) Reagents: CODL00, CODL150, CODH00, CODM150, CODHP0, CODH150; Thermoreactor: COD165
Range Low Range: 0 to 150 mg/L O2; Mid Range: 0 to 1500 mg/L O2; High Range: 0 to 15000 mg/L O2
Dimensions (L x W x H) 155 x 75 x 35mm
Wavelength Accuracy ±1 nm


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