GE Whatman* Binder-Free Multigrade GMF 150 Filters

Higher particulate loading capacity with extended life of filter. Manufactured from 100% borosilicate glass microfibers, the filter is binder-free and unique in its construction: a coarse layer on top of, and meshed with, a fine layer. The Multigrade traps larger particles in the pores or on the surface of the coarse layer while the medium-sized particles are caught in the interface meshing. The smaller particles are netted in the interstices of the fine layer. When used as a prefilter it nearly doubles the volume of sample filtered compared to a single density prefilter. Compared to an unprotected membrane, the volume of sample filtered is three to seven times greater. Notes to specifications: Thickness is measured at 53 kPa. Immersed water absorption of a 7 x 1 cm strip. Linear wicking time to rise 7.5 cm. Radial wicking time to reach 7.5 cm.
Image(s) are representative of the product group and not necessarily the individual product.

Circles, 1 µm
Pore Size (µm): 1
Size (mm): 47
Basis Wt. (g/m²): 143
Thickness (µm): 737
Gurley Porosity (ml): 3.6 sec (100)
Retention Efficiency: 98%
Particle Retention (µm): 1.2
Water Absorption (Immersed): 164 mg/cm²
Water Absorption Drop (ml): 1.3
Dry Tensil g (cm): 680 (1.5)
Wet Tensile: 320 g/1.5 cm
Radial Wicking Rate: 0:59 (min:sec)

Circles, 1 µm
Pore Size (µm): 1
Size (mm): 90
Basis Wt. (g/m²): 143
Thickness (µm): 737
Gurley Porosity (ml): 3.6 sec (100)
Retention Efficiency: 98%
Particle Retention (µm): 1.2
Water Absorption (Immersed): 164 mg/cm²
Water Absorption Drop (ml): 1.3
Dry Tensil g (cm): 680 (1.5)
Wet Tensile: 320 g/1.5 cm
Radial Wicking Rate: 0:59 (min:sec)

Circles, 2 µm
Pore Size (µm): 2
Size (mm): 47
Basis Wt. (g/m²): 144
Thickness (µm): 775
Gurley Porosity (ml): 1.8 sec(100)
Retention Efficiency: 98%
Particle Retention (µm): 2.0
Water Absorption (Immersed): 147 mg/cm²
Water Absorption Drop (ml): 1.2
Dry Tensil g (cm): 540 (1.5)
Wet Tensile: 333 g/1.5 cm
Radial Wicking Rate: 1:03 (min:sec)

Circles, 2 µm
Pore Size (µm): 2
Size (mm): 90
Basis Wt. (g/m²): 144
Thickness (µm): 775
Gurley Porosity (ml): 1.8 sec(100)
Retention Efficiency: 98%
Particle Retention (µm): 2.0
Water Absorption (Immersed): 147 mg/cm²
Water Absorption Drop (ml): 1.2
Dry Tensil g (cm): 540 (1.5)
Wet Tensile: 333 g/1.5 cm
Radial Wicking Rate: 1:03 (min:sec)