Prefiltry szklane GMF 150
Prefiltry GMF 150 są wielowarstwowymi filtrami o stopniowanej gęstości przeznaczonymi do szybkiej i wydajnej filtracji próbek o wysokiej zawartości cząstek stałych.
Whatman™ GMF 150 prefilters are multilayer graded density filters for rapid and efficient filtration of samples with high solids content.

• Compared to an unprotected membrane, greater sample volume can be filtered
• Higher particulate loading capacity and faster flow rates than uniform prefilters
• Excellent particle retention (both large and small particles)
• 100% borosilicate glass, binder-free
• Extends life of final filter membrane

Multilayer filter design
When a sample is applied, the multigrade glass filter traps larger particles in its pores or on the surface of the coarse layer, medium-sized particles in the interface meshing, and smaller particles in the interstices of the fine layer. The multilayer design provides comprehensive particle retention.
Prefiltry szklane GMF 150
Grade GMF 150 1 µm GMF 150 2 µm
Description Multilayer Multilayer
Typical particle retention in liquid (µm) >1 >2
Nominal air flow (s/100 mL/in) 4 1.6
Nominal thickness (µm) 730 750
Nominal basis weight (g/m) 145 145
Typical water flow rate (mL/min) 222 887
Maximum recommended temperature (°C) 550 550
Product Product Name Format Dimensions
1841-047 Glass Microfiber Prefilter; 1 µm particle retention rating; 47 mm circles (40 pcs) 47 mm 1841-047
1841-090 Glass Microfiber Prefilter; 1 µm particle retention rating; 90 mm circles (20 pcs) 90 mm 1841-090
1842-047 Glass Microfiber Prefilter; 2 µm particle retention rating; 47 mm circles (40 pcs) 47 mm 1842-047
1842-090 Glass Microfiber Prefilter; 2 µm particle retention rating; 90 mm circles (20 pcs) 90 mm 1842-090
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