Glass Fiber Filters, 934-AH® in sizes ranging from 21mm through 8" x 10" sheets. Fine porosity, fast flow rate, with a 1.5µm size particle retention. This material is the standard for
suspended solids content and related measurements (Standard Methods 2540D and EPA Method 160.2). Also widely used in cell harvesting applications and RIA scintillation
counting. Grade 934-AH® is a binderless borosilicate glass microfiber which enables use up to 550° C.
Specifications:
- Particle retention: 1.50µm
- Filtration Speed: 47 sec
- Thickness: .43mm
- Basis Weight: 64g/m²
Grade 934-AH® is specified in standard methods for use in:
- Determination of Suspended Solids
- Determination of Total Dissolved Solids
- Determination of Total Solids
- Determination of Total Volatile Solids
Grade 934-AH® is the only grade of borosilicate glass microfiber approved for use in volatile suspended solids (v.s.s.)
Filter Grade Comparison
Zefon
|
Whatman
|
S&S
|
Millipore
|
Pall
|
Alhstrom
|
MFS
|
| 934-AH®
|
934-AH®
|
30
|
AP-40
|
--
|
161
|
GC-50
|
Available Sizes/Product Cross Reference:
| Diameter |
Zefon
Product Number |
Whatman Equivalent |
S&S Equivalent |
Millipore Equivalent |
Ahlstrom Equivalent |
| 21mm (2.1cm) |
IW-AH2100 |
1827-021 |
-- |
-- |
1610-0210 |
| 24mm (2.4cm) |
IW-AH2400 |
1827-024 |
-- |
-- |
1610-0240 |
| 25mm (2.5cm) |
IW-AH2500 |
1827-025 |
-- |
-- |
1610-0250 |
| 35mm (3.5cm) |
IW-AH3500 |
1827-035 |
-- |
-- |
N/A |
| 37mm (3.7cm) |
IW-AH3700 |
1827-037 |
-- |
-- |
N/A |
| 42.5mm (4.25cm) |
IW-AH4250 |
1827-042 |
-- |
-- |
1610-0425 |
| 47mm (4.7cm) |
IW-AH4700 |
1827-047 |
-- |
-- |
1610-0470 |
| 55mm (5.5cm) |
IW-AH5500 |
1827-055 |
-- |
-- |
1610-0550 |
| 70mm (7.0cm) |
IW-AH7000 |
1827-070 |
-- |
-- |
1610-0700 |
| 90mm (9.0cm) |
IW-AH9000 |
1827-090 |
-- |
-- |
1610-0900 |
| 110mm (11.0cm) |
IW-AH1100 |
1827-110 |
-- |
-- |
1610-1100 |
| 125mm (12.5cm) |
IW-AH1250 |
1827-125 |
-- |
-- |
1610-1250 |
| 150mm (15.0cm) |
IW-AH1500 |
1827-150 |
-- |
-- |
1610-1500 |
| 8" x 10" Sheet |
IW-AHS810 |
1827-866 |
-- |
-- |
N/A |
All sizes come packed with 100 filters per box
The trademark 934-AH® is owned by Whatman Inc. and used under license.
| 
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