Sulphur Dioxide Diffusion Tubes

This tube is suitable for passive monitoring of Sulphur Dioxide (SO2). We offer more than 1 type of tube that are suitable for SO2 monitoring:

  • SO2
  • NO2/SO2 combined


Sources of SO2:

  • Fossil fuel combustion – industry, power generation, vehicles.
  • Domestic boilers or fires.
  • Metal extraction.
  • Paper production.
  • Volcanoes.
  • Natural fires.


Potential implications of SO2 pollution:

  • Harmful to plants – reduced crop yields.
  • Involved in acid rain formation – damage to buildings, forests.
  • Adverse effects on the respiratory system.


For more information select the downloads option below to download a copy of our instructions or techsheet for these tubes.


NO2/SO2 combined tube types cannot be shipped outside of the UK without an export license – Gradko is in no way affiliated with obtaining export licenses.


Sulphur dioxide is particularly associated with the use of diesel and coal, two widely used fuels. Due to its implications for human health and on the environment, it is widely regulated. Therefore monitoring should be conducted in the following areas at risk of high concentrations:

  • Adjacent to fuel burning industries, power stations etc.
  • Roadside monitoring as part of traffic management schemes.
  • Environmental monitoring – in proximity to volcanoes or in forests to assess potential vegetation damage.
  • Indoor air monitoring – buildings near busy roads, in-vehicle concentrations, buildings with open fires.
  • Monitoring for health purposes.
  • Occupational monitoring (e.g. taxi drivers, bus drivers, machinery operators).

DIF600RTU-RA – Supply and analysis of Sulphur Dioxide diffusion tube.


Tube holders sold separately:

DIF-1000 – Plastic fixing clip

DIF-2000 – 360 mm fixing strap

DIF-2001 – 760 mm fixing strap

DIFSHLTR-S – Shelter for 3 tubes


Analysis is carried out in our UKAS accredited laboratories. Results are provided within 10 working days or can be pre-booked for fast track.

Featured Product

Washers - Pack of 10

These washers fit around the diffusion tubes allowing them to sit comfortable inside our circular clips.

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