APG E Series
Ferrotec's APG E-Series ferrofluids are based on the same chemistry as the APG
900 series ferrofluids so their properties are similar. However, the Eseries
fluids have been tailored to meet specific requirements of a
loudspeaker by altering their colloid stability or magnetization and
viscosity values. These ferrofluids cover a broad range of
applications due to their customized nature. An "E" type ferrofluid
can be used for heat transfer alone or for heat transfer and damping.
The transient temperature capacity of these fluids is 200°C,
however, to ensure long term reliability, operation above 115°C for
extended periods should be minimized. They are durable under high
humidity and in contact with water.
Carrier Liquid: synthetic hydrocarbon
Appearance: black-brown or red-brown viscous fluid
| |
Saturation Magnetization (Ms) |
Viscosity |
| |
CGS Units |
SI Units |
CGS Units |
SI Units |
| Ferrofluid type |
Gauss |
mT |
cP |
mPa-s |
| APG E11 |
275 |
27.5 |
1000 |
1000 |
| APG E18 |
137.5 |
13.8 |
90 |
90 |
| APG E23 |
192.5 |
19.3 |
400 |
400 |
| APG E25 |
220 |
22 |
1000 |
1000 |
| APG E26 |
275 |
27.5 |
300 |
300 |
| APG E32 |
330 |
33 |
1200 |
1200 |
|