FilterTec
NFF System provides significant cost savings when used with any commercially
available membrane or depth filters.
The FilterTec
utilizes a peristaltic pump head as well as a disposable pressure sensor
(see SciLog¡¯s disposable sensors).
A user-selected
pump rate (or time-based rate ramp) is implemented until a user-defined
pressure level is reached, e.g.
20 psi.
At this
point, the filter is substantially plugged-up, the FilterTec switches
from a rate control to a pressure controlled fluid
delivery.
The FilterTec
automatically maintained the selected pressure limit by modulating, i.e.
decreasing, the pump output.
When the
pump output reaches a user-selected lower pump rate limit, e.g. 1 ml/min,
the FilterTec safely stops the filtration
process.