Thermo Orion AQ4000 Colorimeter

The Thermo Orion AQ4000 colorimeter stores up to 189 pre-programmed methods and can record 100 data points in the field with a time and date stamp.


  • Auto-ID and pre-programmed methods ensure error-free readings at a very affordable price
  • Up to 12 data points can be used to define a custom method and a maximum of 10 methods can be stored in the memory
  • Never become obsolete because new methods can be easily downloaded
List Price $1,460.00
Your Price $1,357.80
Stock Drop Ships From Manufacturer  

Thermo Orion AQ4000 colorimeter has the Auto-ID feature that automatically identifies the species to be measured, selects the program and initiates the measurement without the user ever having pushed a button! The AQ4000 with its Auto-ID and pre-programmed methods ensure error-free readings at a very affordable price.

This rugged and attractive unit is waterproof to IP67 standards. The AQ4000 is so advanced, a user can customize a calibration and create a completely custom method. Up to 12 data points can be used to define a custom method and a maximum of ten methods can be stored in the colorimeters memory. The simple operation guides a user through the setup and measurement.

Selection of display units is a button press away. Selectable measurement units include concentration, absorbance or percent transmittance. Datalog 100 points in the field with a time and date tag, then download to a printer or computer in the lab. The AQ4000 carries a two-year warranty.

* Reagent kits sold separately

  • Wavelength (nm) 420, 520, 580, 610
  • Wavelength Accuracy 2 nm
  • Wavelength Selection Automatic
  • Photometric Linearity 0.002 A (0-1 A)
  • Photometric Reproducibility 0.005 A (0-1 A)
  • Photometric Accuracy 0.005A @ 1.0 ABS Nominal
  • Photometric Range 0 2 A
  • Stray Light< 1.0% at 400 nm
  • Source Lamp Light Emitting Diode (LED)
  • Detector Photodiode
  • Bandwidth 10 2 nm
  • (1) AQ4000 meter
  • (4) AA batteries
  • (1) 16mm vial
  • (1) 16mm vial adapter
  • (1) 13mm vial adapter
  • (1) Field case
  • (1) User guide with test methods
  • (1) Tablet tampering stir rod
  • (1) Vial cleaning brush
Questions & Answers
Can I transfer data from my Colorimeter?

Yes, the AQ4000 Colorimeter can transfer data via the optional RS232 cable (available under the Accessories tab) and can store up to 100 data points in the memory.

How many vials does the AQ4000 colorimeter come with?

The Thermo Orion AQ4000 colorimeter comes with one 16mm vial, as well as an adaptor for 16mm and 13mm vials. Additional vials in 16mm or 24 mm are available under the Accessories tab.

Please, mind that only logged in users can submit questions

Select Options

  Products 0 Item Selected
Part #
Thermo Orion AQ4000 Colorimeter
Orion AQ4000 colorimeter with carrying case
Drop Ships From Manufacturer  
  Accessories 0 Item Selected
Notice: At least 1 product is not available to purchase online
Multiple Products

have been added to your cart

There are items in your cart.

Cart Subtotal: $xxx.xx

Go to Checkout

In The News

Environmental Dredging and Remedial Construction

Though dredging is often painted in a negative light, dredging initiatives and projects are often conducted to improve environments, begin recovery periods for water beds contaminated with toxins, and reinvigorate ecological systems and habitats. Many of the technicians and engineers who plan and execute dredging projects are dedicated to balancing the economic benefits of dredging with protecting the environment. Sevenson Environmental Services Inc.  provides sediment remediation as one of many key services offered to help restore natural environments. Steven Shaw spent more than a decade working as an engineer on various dredging projects before finding his way to Sevenson eight years ago.

Read More

Caring for the Chesapeake: Supporting the Iconic Bay Starts with Good Monitoring Data

The Chesapeake Bay is enormous: the Bay and its tidal tributaries have 11,684 miles of shoreline—more than the entire U.S. west coast. It is the largest of more than 100 estuaries in the United States and the third largest in the world. The Bay itself is about 200 miles long, stretching from Havre de Grace, Maryland, to Virginia Beach, Virginia. But the Chesapeake Bay isn’t just enormous--it’s enormously important. The  Chesapeake Bay Program  reports that its watershed covers about 64,000 square miles and is home to more than 18 million people, 10 million of which live along or near the Bay’s shores.

Read More

Treating Harmful Algal Blooms: A Natural Progression

Some of us happen upon the subject of our life’s work by accident, some of us are born into it, and some of us ease into it over time. For Tom Johengen, Research Scientist for Cooperative Institute for Great Lakes Research (CIGLR) and Director of Michigan Sea Grant , choosing to study Harmful Algal Blooms (HAB) was “a natural progression” from his days as a grad student investigating best management practices for controlling nonpoint source nutrient pollution. “I’ve been the research scientist with CIGLR since my postdoc in 1991, 31 years, and I’ve been the Director of Michigan Sea Grant for the past 3 years. When I began my postdoc with CIGLR we were just starting to study the impacts of the recently invaded zebra mussels.

Read More