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Filter Funnels |
Filter funnels are used to measure and concentrate particulate in a fluid sample onto a membrane filter or to purify the filtrate. When selecting a funnel, consider:
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Selection Guide – Filter Funnels
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| Filter Size (mm) | 25 | 25,47 | 47 | 47 | 47 |
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| Product Number | 4203, 4204 | 4240, 4221 | 4230 | 4011,4012, 4013 | 4238, 4241, 4242, 4247 |
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| Description | Polysulfone | Stainless Steel | Parabola Stainless Steel2 | Glass | Polyphenyl-sulfone |
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| Autoclavable?1 | Yes3 | Yes | Yes | Yes | Yes3 |
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| HPLC/IC/Mobile Phase/Degassing |  |
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| Microbiology, Pharmaceutical | |
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| Microbiology, Environmental | |
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| Microbiology, Beverage | |
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| Microbiology, Industrial Process Water | |
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| Solvent Filtration | |
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| Water Sampling (Ground/Water) | |
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1 Limited by filter type. 2 Do not use funnel for filtration of high purity fuels, as explosion may occur. 3 Repeated use of detergents containing polyoxyethylated alkyl phenols and alcohols, and/or anti-corrosion, anti-scaling boiler additives that may carry over in steam, may cause funnel material to crack, thereby reducing the life of the product. Do not autoclave rubber stoppers. Do not autoclave with aluminum foil; use autoclave paper. | |||||
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