Passive monitoring technology provides low-cost long-term air sampling over a large area without the need for capital investment, infrastructure or a power supply. Its simplicity aids its versatility.
Our products are now available for a wide range of pollutants and our research into new equipment or applications is ongoing.
Gradko is based in Winchester, UK, providing manufacturing and global distribution of our air monitoring products. Our dedicated laboratory is a UKAS accredited testing laboratory (No. 2187) to ISO:17025:2017 and provides accurate and timely analysis of our customers samples.
We were pioneers in the development of passive diffusion tubes (Palmes Tubes) in conjunction with the UK Government Department of Trade and Industry. Over the subsequent 50 years our success has been built on providing a progressive, flexible and cost-effective service.
The technical knowledge acquired during the development phases enable us to provide a comprehensive technical back-up service. This, combined with customer driven quality objectives, provides an ongoing path to excellence in all that Gradko Environmental sets out to achieve.
Our acrylic passive diffusion tubes (palmes tubes) are suitable for long-term monitoring – recommended 2-4 weeks. They require no power supply, making them an efficient monitoring option.
Our stainless-steel sorbent tubes (VOC tubes) are suitable for active or passive monitoring depending on the scope of your project, we have a varying range of sorbents allowing volatile organic compounds in the range of C2-C28 to be measured.
Both our tube options are simple to use, with very low detection limits (in the low parts per billion range) allowing for low levels of inorganic compounds to be identified if present
Look through the products and applications in the drop-down menu to the left to see what we can offer for your air pollution products and services.
To download our information sheets on how our diffusion/VOC tubes work click the below links:
