EON’s Dual Membrane™ Passive Diffusion Sampler (DMPDB™) is the world’s number one PDB for sampling virtually any analyte.
DMPDB™ samplers obtain representative discrete interval samples of nearly any dissolved compound in groundwater without purging or pumping, including; VOCs, SVOCs, Metals, Ions, Cations, Inorganics, and the compounds of emerging concern, 1, 4 Dioxane and PFAS. Effectively reduce sampling cost and eliminate investigation derived waste at any groundwater sampling site.
DMPDB™ Design Features
- Two separate semi-permeable membranes around a single sample chamber allow virtually any molecule dissolved in groundwater to diffuse into the DMPDB.
- Perforated support tube provides strength and maintains sample volume in high ionic groundwater conditions.
- Semi-permeable LDPE membrane holds deionized water and allows transmission of VOCs into sampler.
- Large-pore upper membrane allows entry of virtually any analyte into the sampler, for a complete water sample.
- Built-in connection points facilitate easy attachment to the suspension tether using zip-ties
- Easy to empty. Just puncture with our “Juice-Box Straw” and empty directly into lab bottle.
- Filling port for field, lab, or factory filling.
- 1.75-inch diameter fits 2-inch Schedule 40 wells.
- Lengths up to 28-inch provide sample volume up to 650-ml.
Why Use the DMPDB™?
- Sample for a wide range of analytes (not just VOCs).
- Reduce sampling cost 50%-70% by eliminating field time spent purging and sampling
- Eliminate the cost of purge-water and investigation derived waste (IDW) disposal.
- Easy and quick installation and recovery helps in high-traffic areas and for Social Distancing
- No expensive, complicated, or bulky equipment to purchase, maintain, or mobilize.
- Obtain depth-specific concentration profiles.
- Reduce sampling error and improve repeatability.
- A Greener sampling method. Less disposable material, no batteries, gasoline or waste