The 30 x 100 Thimble Adapter has proven to be the most popular and useful size for in-stack sampling applications.
Versatility is now available with one sampling unit.
All available collection media can now be employed, i.e. cellulose, fiberglass and alundum thimbles . It has the capacity for all but the heaviest loadings and yet is sufficiently compact and lightweight to offer no significant handling problems. The rugged nature of the alundum substrate permits the attainment of differential pressures limited only by the suction capacity of your pump. Like the well established fiberglass thimbles, this technique completely eliminates the requirement for probe cleanout. Federal Register, Vol.