In-Stack Thimble Holder Kit

Description

The GFA-2590K In-Stack Thimble Holder Kit includes a selection of the 7 most commonly used nozzle inserts form 1/8” to 1/2″ and one housing. The entire kit is conveniently packaged in a foam-lined carrying case for protection. The Thimble holder connects directly to the end of the probe with a 5/8” tube union. One Metal Taper Clip is included in the kit. The unique integral nozzle design reduces weight and breakage. The entire assembly is lightweight and uses no O-Rings which allows for testing at much higher temperatures. Quartz filter assemblies are available for testing in temperatures up to 1000°C.

We offer 2 different filter media (Glass and Quartz). The Thimbles are seamless, high purity filters, tapered for ease in loading. The gas collection efficiency of the thimbles is 99.9% (%0.3 mm DOP). The Thimble Filter Media comes in boxes of 10.

• GF-2590 – Glass fiber thimble, 25 x 90mm, max 500°C. These Borosilicate Glass Fiber Thimbles are acid washed to reduce the trace metal content to an absolute minimum.
• GF-2590Q – Quartz fiber thimble, 25 x 90mm, max 1000°C. Silica Fiber Thimbles are strengthened with alumina and are prefired at 900°C for 2 hours during manufacturing to stabilize the weight prior to use.

**The conditional method for Ammonia (CTM-027) requires an In-Stack Method 17 Filter Holder constructed from Borosilicate glass or PFA and a glass fiber filter. The Apex GFA-2590 Thimble holder is constructed totally from Borosilicate Glass and accepts tapered 25 x 90 mm thimbles especially manufactured for stack sampling. Our design does not require the use of o-rings. This allows for testing at higher temperatures. The borosilicate glass will withstand temperatures up to 900°F (480°C).