RF Admittance Level Measurement Desalter Series0 pages

DREXELBROOK

®

A Leader In Level Measurement Solutions

Desalter Interface Measurement
For all Electrostatic Separators
Maximize throughput of oil/water
separators with reliable, no maintenance,
level transmitters.
A typical separator contains four phases: Oil on the
top (electrically insulating), water and sediment at
the bottom (electrically conductive), and a two-part
emulsion phase in-between. The upper part of the
emulsion phase consists of wet oil (water particles
surrounded by oil which is electrically insulating).
The lower part is oily water (oil particles surrounded
by water which is electrically conducting.) There is
an electrical interface in the emulsion where the wet
oil meets the oily water.

Maximize Throughput
• Reduces water content in crude oil

Reduces Maintenance Costs
• No moving parts.

Measures close to the grids
Worldwide Approvals
Measurement Independent
of density, temperature, and
pressure changes

The electrostatic field operates at maximum
efficiency when this electrical interface is close to
the electrostatic grid. If this electrical interface is
too far away from the grids, coalescing efficiency is
significantly reduced. If it touches the grid, it draws
huge currents.
AMETEK Drexelbrook’s RF Interface Transmitters
accurately measure the electrical interface in the
emulsion even in upset conditions. The transmitter
allows operators to keep this electrical interface
close (but not too close) to the grids, to maximize
throughput. The AMETEK Drexelbrook instrument
also ignores build-up on the sensing element, and
is unaffected by density changes
It is also applicable for thermoelectric treaters and
other electrostatic coalescers.