Soil gas sampling is easier with Merit Laboratories’ helium shroud. Working closely with our client’s field sample collection needs in mind, Merit developed a helium shroud that makes soil gas sampling more efficient, accurate, and reproducible. And don't worry about tools or calibration in the field. Merit’s helium shroud requires no tools or field calibration. The helium shroud's quick-connect ports are proven time savers in the field. We make it easier.