Passive Diffusion Sampler (PDS)
Application
No purge sampling. Diffusion type water samplers for low cost discrete interval sampling
Features and Specifications
- Ideal for long term monitoring or for vertical profiling
- Suitable for 50mm or larger wells and where there is a natural flow of groundwater passing through well screen
- Standard size 460mm long, 44mm diameter, 350ml sample. Other sizes available for larger wells or larger sample volume
- Most suitable for sampling non-polar VOCs
User’s Advantage
- Simple to use, low cost, low labour requirement
- Enables vertical profiling of VOC concentrations
- Suitable for the most common VOC’s in particular BTEX and chlorinated solvents
- Useful if needing to remove interference from metals
- Excellent for formations of low permeability
- No need for purging. Minimal to no agitation effects. No need for filtration of samples
Limitations
- Some compounds do not diffuse through the membrane — (eg., some less common VOCs, ketones, ethers, alcohols, inorganic ions, non-volatile organics, metals)
Ordering Information
| Item No. | Description |
|---|---|
| TR-10200 | Passive Diffusion Sampler - 350ml (disposable) |
| TR-10096 | Stainless Steel Hanger (reusable) |
| TR-10095 | Stainless Steel Weight, Standard (reusable) |
| TR-10098 | Stainless Steel Weight, X-Heavy (reusable) |
| TR-10097 | Optional Fill Device (reusable) |
| Also need: | Well Cap, Tether or Rope, Clips, Cable Ties |
