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Discrete Analyser AQ300

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SEAL Analytical

The AQ300 Discrete Analyser from SEAL Analytical is a powerful analyser ideal for smaller work loads.

For larger laboratories: AQ400 Discrete Analyser

The AQ300 Discrete Analyser is the latest nutrient analyser from SEAL Analytical.  All the benefits of the larger AQ400 Discrete Analyser are now available to labs with less space or smaller workloads. The AQ300 is designed specifically for environmental samples and incorporates design features that ensure the best reproducibility, the lowest detection limits and a guarantee of no cross contamination, even when ammonia, nitrate with cadmium detection and phenol are run together.

Choose the best Discrete Analyser for your laboratory.



Compact bench-top analyser for environmental laboratories


Highest speed and capacity. Lower detection levels.

Simultaneous Chemistries 1-14 1-14
Tests Programmable Per Sample YES YES
Test Capacity 180 216
Cadmium Coil Optional Integrated
Standalone Spectrophotometer NO YES
Total Volume Per Test 500-700 μL (sample & reagent) 500-700 μL (sample & reagent)
Sampling Rate Subject to chemistry Subject to chemistry
Sample Blanking YES YES
Add Samples After Run Commenced YES YES
Sample Trays (removable) 57 & 97 positions 80 & 120 positions
Sample Consumption 2-500 μL 2-500 μL
Sample Cup Sizes 1.2 mL, 2 mL 1.2 mL, 2 mL, 5 mL
Sampling Arms 1 2
Reagent Capacity 18 26
Reagent Cooling YES YES
Reagent Volume 10-500 μL 10-500 μL
Reagent Wells Disposable Disposable
Reagent Monitoring Automatic Automatic
Reagent Level Sensing Optional YES
Auto Start Up/ Shut-down YES YES
Auto Dilution YES YES
Auto Spike Preparation YES YES
Auto Standard Preparation YES YES
Segregated Wash Waste YES YES


 Contact us on 02 4735 5054 or 0061 2 4735 5054 (from NZ) or

The AQ300 compact Discrete Analyzer is the latest analyser in the AQ series, faster, higher throughput, 20% more reaction wells and up to 97 sample positions.

  • 10mm path length for maximum sensitivity
  • Best reproducibility
  • Lowest detection limits
  • Economical- save money on reagent and waste costs, with less than 50ul waste per sample,
  • Run up to seven different chemistries from each sample in the same run.
  • Auto standard preparation
  • Auto dilution
  • Automatic method changeover
  • Carry over and cross contamination eliminated
  • Completely unattended operation ideal for overnight-programed runs.
  • Scheduling of 1 to 7 tests on a single sample with any analyte in any order
  • Compact Discrete Analyser designed specifically for the nutrient analysis needs of environmental laboratories
  • Methods have USEPA approval for both wastewater and drinking water.
  • UKAS methods are equivalent to “UK Blue Book”
  • Methods specially optimized for soil analysis.

Contact us on 02 4735 5054 or 0061 2 4735 5054 (from NZ) or 

A Discrete Analyser With EPA Compliant Methods

The broad range of methods for the AQ300 Discrete Analyzers include analytes important for nutrient analysis of water, wastewater, soils etc.

  • Methods include:
  • Alkalinity
  • Ammonia
  • Chloride
  • Cyanides
  • Nitrate/ Nitrite
  • Nitrite
  • Phenolics
  • Phosphate, ortho
  • Phosphorous, total
  • Silicate
  • Sulfate
  • Total Kjeldahl Nitrogen
  • And more.

Link to Discrete Analyser methods (this link takes you to the SEAL Analytical website in a new window)

Contact us on 02 4735 5054 or 0061 2 4735 5054 (from NZ) or


How Does the AQ300 Discrete Analyser Work?

  • A robust sampling arm works in conjunction with a stepper motor-driven syringe that is responsible for aspirating, dispensing and mixing accurate and precise quantities of sample & reagent in miniaturised test tubes (reaction wells).
  • The sample and reagent are incubated in the reaction wells for a pre-programmed time. A single aliquot is transferred into a 10mm, 100% optical glass cuvette, with the absorbance read on the stationary reactant to ensure the best possible signal to noise ratio.
  • A second robotic arm moves reactant/ sample from the reaction wells to the detection area. The sample is always read in the same position in front of the detector, in the same glass cuvette, eliminating issues of scratching and reaction well variability found with direct read systems. As the liquid is moved, not the tray, fewer moving parts means higher reliability.
  • Supplied standard methods have optimised reaction times ensuring the reaction is brought to completion. The complete reaction emulates the manual & segmented flow methods and ensures the lowest detection limits and good reproducibility.
  • After the absorbance is read, the glass cuvetted is thoroughly cleaned and checked ensuring no carry-over or cross contamination.
  • With the patented probe flusher, water from the wash bottle is pumped through the probe flusher as the probe moves up and down through it to clean the outside before dipping in the next liquid.


Contact us on 02 4735 5054 or 0061 2 4735 5054 (from NZ) or


Seal analytical logoSEAL Analytical Limited is a UK based developer of automated wet chemistry discrete analysers for use in environmental and industrial laboratories.  SEAL has over 25 years experience with automated discrete analysis.  Visit www.seal-analytical.com

In 2002, SEAL formed a wholly owned US subsidiary based in Milwaukee, Wisconsin to promote the sales of wet chemistry discrete analysers in the US and Canada.  Subsequent to this, SEAL's international roll-out continued with distributors being approved in European and Asian Pacific countries.

In 2004, SEAL became the exclusive distributor of Bran+Luebbe Continuous Flow Analysers in the USA, UK and Ireland.

In November 2006, SEAL completed the acquisition of the Bran+Luebbe Continuous Flow Analyser (CFA) and Near InfraRed  (NIR)  Analyser businesses.   This brings together over 50 years of CFA analysis experience of B+L , formally Technicon Industrial Systems, with SEAL's 25 year track record in discrete analysis, allowing SEAL to offer a truly complimentary solution in Automated Chemical Analysis for environmental and industrial laboratories throughout the world.

In August 2008, SEAL joined the Porvair group of companies. Porvair is a specialist filtration and environmental technology group.  This will allow SEAL to continue its dynamic growth  and success worldwide.

Visit SEAL Analytical website: www.seal-analytical.com

Contact us on 02 4735 5054 or

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