One of the Best Sellers from HAWACH–Extraction Thimbles

Hawach offers a range of specialty products to meet your specific testing requirements. Made with traditional Hawach quality, these products combine ease of use with unsurpassed accuracy and consistency.

Extraction Thimbles
Widely used in Soxhlet extraction units, Hawach cellulose and glass microfiber extraction thimbles are known for their purity and consistent high quality. As an efficient method of solvent extraction of solids and semi-solids, they are able to provide a safe and convenient lab helper.

Hawach offers a wide selection of high-quality extraction thimbles, manufactured in high purity cellulose fibers or high purity glass binderless microfiber. Custom manufacturing is available for tubes, sleeves, and additional sizes. Moreover, the cellulose extraction thimbles have a standard and enhanced one with a different but consistent thickness of the wall. The standard ones’ thickness is 1–1.5 mm to support application needs and double thickness for added rigidity.

Common Thimble Applications
Analysis of air and exhaust
Collect solid particles, such as dust
Monitoring funnel gas
Pesticide residue analysis
Detection of the fat content of solid food
Lipid analysis of solid waste
Biochemical analysis elution

Soxhlet Glass Fiber Extraction Thimbles
Cellulose Extraction Thimbles for Soxhlet

High-Performance Cellulose Extraction Thimbles
Produced from high-quality alpha cellulose cotton linter and with excellent mechanical strength and retention, Hawach cellulose extraction thimbles have gained a favorable reputation all over the world, as the high purity of the materials ensures reliable and reproducible analytical results.

Operators can choose the right one based on their specific requirements, for instance, the single-thickness thimbles are standard with a wall thickness of approximately 1 mm (10.0 µm nominal particle retention), and the double-thickness thimbles are needed when higher retention and increased wet or dry strength, or rigidity is required, with a wall thickness of approximately 2 mm (6.0 µm nominal particle retention).

For the two specifications of the cellulose extraction thimbles, the standard ones are more frequently used. How select the thimble size is based on the specific requirements to fit extractors correctly. The different dimensions represent established conventions, showing the inner diameter and total length of the thimble in millimeters. As a result, the wall thickness should be considered when calculating the outside diameter. The thimble should pass through the narrower end of the upper suction pipe, leaving a gap of 1-2 mm and 5-10 mm above the top of the siphon.

High-Purity Glass Microfiber Thimbles
manufactured from 100% pure borosilicate glass, Hawach glass microfiber thimbles with high-purity are available for different applications. Completely free of binders or additives, it can be used at temperatures over 120°C and the maximum temperature up to 600°C or when using solvents that are incompatible with cellulose thimbles, say the strong acid. They can also be used in pollution monitoring techniques (0.8 µm nominal particle retention). Typical thickness of 1.7 mm.

To sum up, Hawach offers thimbles whose dimensions are matched exactly to those of the thimble holders to ensure optimal fit for all automated extraction apparatus in common use.