In-Stack Thimbles

Apex Instruments stocks a variety of Thimbles for in-stack particulate sampling. The thimbles are seamless, high-purity filters and are available from a choice of two different types of fibers: borosilicate glass and quartz.  The gas collection efficiency of the thimbles is 99.9% (0.3 micron DOP). The 25 x 90 mm thimbles are specifically manufactured for stack sampling and tapered for ease of loading. Cellulose thimbles are available upon request.