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Hydrological Equipment

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Modified Hesslein In-Situ Pore Water Sampler, Acrylic 300ml

Item No.:
3.00 LBS

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The Modified Hesslein In-situ Pore Water Sampler, also called a "peeper" or dialyzer is based on the principle that given enough time, a contained quantity of water in the sampler will diffuse and equilibrate through dialysis membrane, or other materials such as porous TEF, with the surrounding water and its dissolved solutes. The in-situ equilibrator can either be removed to the surface or the pore water can be collected through attached tubing while the device remains in the sediments.

This sampler is made of two sheets of acrylic plastic (a 0.3 cm thick cover sandwiched with a 1.3 cm thick body) that are held together by screws. Horizontal, elongated sampling compartments are machined 1 cm apart, through the 0.3 cm cover and into the acrylic body. Different types of dialysis membranes are used with these samplers. The membrane is usually pierced with a syringe needle when sampling pore water.


Overall size is approx. 6" x 15"