Groundwater equipment for professionals

Passive samplers & bailers

HydraSleeve No-purge groundwater sampler

PR16

The patented HydraSleeve no-purge sampler is a discrete interval sampler with a unique one-way reed valve. The sampler remains deflated during installation and only fills when retrieved. The reed valve shuts as soon as the sampler is full enabling a 'core' of water to be sampled over a specific depth interval without mixing. The HydraSleeve is used in place of purging and low-flow sampling methods in groundwater monitoring boreholes to obtain a representative, real time, discrete interval sample of ALL compounds, including VOC's, under natural groundwater flow conditions. The HydraSleeve sampler consists of two basic parts - a reusable weight and a long, flexible, lay-flat sample sleeve incorporating a reed valve. The bottom of the flexible sleeve is sealed and the weight is attached to it. The reed valve at the top of the sleeve includes an attachment point for suspension line.

An optional spring clip is available to simplify the attachement of a suspension line whilst keeping the mouth of the sleeve open for efficient filling during retrieval. An optional hollow top weight can be used for sampling for 50mm diameter boreholes where water levels are close to the base. How it works (refer to fig.1) 1 - Sampler Placement A reuseable weight is attached and the HydraSleeve then lowered to depth on a cord or wire line. The top of the HydraSleeve should be placed at the lowest point of the targeted depth interval. Water pressure will keep the sleeve coolapsed and empty of water. Allow sufficient time for the well to return to equilibrium conditions. 2, 3 and 4 - Sample collection and retrieval Pull the HydraSleeve from the borehole. Pull rapidly in one continuous upward movement. The HydraSleeve will fill over an interval of approximately 1.5 times its length. Alterntatively cycle the sampler up and down to fill over a shorter interval. There is minimal change in water level and very little agitation during collection. Once full the sample can be lifted to surface without mixing in the borehole column. 5 - Sample transfer Samples are removed by puncturing the full HydraSleeve with a pointed discharge tube (supplied) and draining into sample containers or other field equipment.

© Copyright Waterra UK Limited 2010. Our policy is to continuously review and update product design, therefore some details may differ from the actual product sold.

Waterra (UK) Ltd, Unit 4, 179-189 Stratford Road, Shirley, Solihull B90 3AU, UK Tel: +44 (0)121 733 7743 Fax: +44 (0)121 733 7746 email: sales@WaterraUK.com

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