The EQUILIBRATOR™ Passive Diffusion Sampler (PDS or PDB) is the world-wide number one passive groundwater sampler.
Diffusion samplers obtain representative, discrete interval samples of Volatile Organic Compounds in groundwater without purging or pumping. Effective for any site where VOCs are the main contaminant of concern.
Why Use the Equilibrator?
- Sample for VOCs
- Reduce sampling cost 50%-70% by eliminating field time spend purging and the cost of purge-water disposal.
- Easy and quick installation and recovery helps in high-traffic areas and for allows 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.
Equilibrator Design Features
- Built-in Protective Mesh protects the sampler membrane and adds strength.
- Connection loops to facilitate easy attachment to the suspension tether using zip-ties
- Semi-permeable LDPE membrane holds deionized water and allows transmission of VOCs into sampler.
- Easy to empty. Just puncture with our VOC “Juice-Box Straw” and empty directly into lab bottle.
- Filling port for field, lab, or factory filling.
Reusable Suspension Tether
PDBs are installed on a reusable, weighted suspension tether connected to the underside of the well cap. EON’s Tether Service provides a custom tether for each well; cut to length, with attached weight, locking well cap, stamped well ID Tag, and connection rings located in the precise depth location you specify. The tether is reused in the same well to ensure samplers are placed in the exact same location time after time.
