Description

Free-flushing oceanographic water sampler

The Free Flow Water Sampler is an innovative design that avoids the limitations of the PWS/Niskin bottles caused by their reduced inlet and outlet diameters. The outstanding feature of the Free Flow Water Sampler is the really free-flushing construction of the sampler where no cone or ball valve influences the water exchange inside the sampling tube.

The Free Flow Water Sampler features a plastic (PVC and POM) design, consisting of a tube with two lids connected by a stainless steel spring. The lids are kept open during descent, caring for perfect flushing of the sampling tube. Like the PWS, the Free Flow Water Sampler on the one hand can be used on Multi Water Sampler/ Rosette/ Carousel arrays, and on the other hand it can be used as a single or series instrument connected to a hydrographic wire. When used directly connected to a hydrographic wire, a messenger (not incl.), dropped down the wire from the surface, and releases the end stoppers for closure. For the use of several Free Flow Water Samplers in a row a second messenger below the first sampler is used to actuate a series of samplers along the wire.

When operated as a single instrument without bottom weight, we recommend using a Centered Mounting Rack (436 385) which cares for a vertical position of the sampler. Retrieve the water sample via the discharge cock/tube at the lower end of the sampler.

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