Model 425 Discrete Interval Sampler

This model is designed to prevent any air contact with the sample all the way to the laboratory, thus retaining all volatiles at down-hole conditions during sampling and during transportation.

The Model 425-T sampler operates in a similar manner to the standard Model 425, but when the sampler is brought under pressure to the surface, the special shut-off valves are closed before the sampler is disconnected from the tubing. Thus air contact with the sample is avoided and the sample is sealed within the sampler with zero headspace, in down-hole condition.

The sampler may then be sent to the laboratory for analysis, without discharging it. The VOCs in the sample will be held in the down-hole state until opened in the laboratory, thus ensuring the highest sample quality at the time of analysis.

Samplers are constructed of stainless steel with Viton® o-rings,Teflon® and polypropylene check balls.

Tubing most commonly used is low density polyethylene (LDPE), however, Teflon® or Teflon-lined polyethylene tubing is also available. Depth markers may be ordered for the tubing in either feet or meters, as an optional extra.

A cable connector is welded to the top of the sampler for easy connection to a suspension cable. The Solinst Tag Line (Model 103) is ideal. It uses polyethylene coated, permanently marked stainless steel, mounted on a reel. It comes with a clip for easy attachment/disattachment and a weight suitable for tagging backfill layers.

The Solinst Discrete Interval Sampler can sample to depths of 500 ft. (150m) below water level, regardless of total depth from surface.

Viton® and Teflon® are registered trademarks of Dupont Corporation.