Welcome to DGT® Research

DGT is a passive sampler device for measuring pollutants, nutrients and other components, either in situ or in the laboratory.

Products supplied for more than 25 years by DGT Research Limited have established DGT as a leading passive sampler, research and monitoring tool, used widely by scientists, agencies and industry. DGT passive samplers can measure metals and organic compounds and are routinely used to monitor water quality and assess soil and sediment contamination and processes. Manufacture is undertaken by a dedicated team in a purpose-built suite of clean laboratories, ensuring high standards of quality control.

New users of DGT are advised to use the Select Your DGT heading at the top of the page. This allows you to select the analytes or groups of analytes you wish to measure and guides you to the DGT product most suitable to your application. The particular DGT passive sampler can be added to your basket for purchase, but note that no payment is required until you are supplied with the goods.

Existing users might wish to select the DGT product they wish to use from the Products section. This allows you to browse the full range of products, including DGT components and select those you wish to purchase.

Within What DGT Does you will find explanations of how DGT passive samplers work, information that enables automatic calibration, detailed guides to their use and useful references.

DGT® is a trademark which is registered throughout the world.

About DGT

DGT® is a pioneering passive sampler for measuring metals, organic contaminants and nutrients, and monitoring water quality either in situ or in the laboratory.
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Our Products

These are the most commonly requested products. If there is a need for a more specialized product please enquire by email because they can usually be made to order.
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Our Guides

Here you will find our guides to using DGT Passive Samplers. There are general guides, detailed instructions for individual products and links to customer produced videos.
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Unclear about anything? Here you will find all of our most frequently asked questions. These are set out into three categories: Definitions, Product Advice and Practicalities.
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Latest News



The DGT Conference Series Returns

14th March 2023
The 7th International Conference on Diffusive Gradient in Thin-Films (DGT2023) will be held in Paris, France, on 11-13 October 2023. It will provide a valuable opportunity to gather the DGT community together again after four…

Price Increases

26th August 2022
We have maintained the same product prices for several years, but reluctantly we are having to make some modest increases. The substantial cost increases in the components we purchase to manufacture the devices have left…

Pattern of DGT Publications

6th April 2022
A detailed analysis of the pattern of more than 1000 papers on DGT published globally demonstrates how the Lancaster laboratory has led the major developments and innovations. It shows the most cited documents and the…

Contact us today

You can contact DGT Research using our contact details at the bottom of this page, or click the button below to send us a message.

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Beware of Poor Products

Although DGT is a registered Trademark there are unscrupulous companies which flout this and sell unlicensed products under the DGT name. Rather than using our well tested polyacrylamide gels made using a special crosslinker only available from DGT Research, they use agarose, even for multivalent cations and anions, including trace metals. It is well established that agarose gel is charged. In freshwaters, this causes DGT measurements of cations to be overestimated and of anions to be underestimated (see FAQ Q(A3)).