SAT
page 3 of 9
Application field
The electrode probe
SAT
, in combination with a suitable evaluation device, is used for conductive limit value
detection in electrically conductive filling materials.
Depending on the application, the electrode rods can have a length of up to 3 m.
With up to four contact electrodes multiple tasks can be fulfilled simultaneously. Among these tasks are e.g.
leakage and overflow protection, minimum / maximum protection resp. multilevel detection in container, pump
protection in pipelines and also the two-position-control of pumps.
The electrode probes are designed for a wide application range.
The conductivity also of aggressive filling materials, with 1 µS/cm and higher can be detected, at process
temperatures from -40 °C to +150 °C, at pressures from -1 bar to +20 bar.
The electrode probes are certificated for the use in explosion hazardous areas acc. to ATEX II 1 G in zone 0.
Function
The electrode probe is mounted directly in the wall of the container or of the pipe by using the respective process
connection or installed over the filling material by using a suitable mount.
The alternating voltage, that is generated by a suitable evaluation electronic is applied either between the
electrode rods or between the electrode rods and the metallic wall of the container resp. pipe that is connected
to the metallic process connection.
As soon as the electrically conductive filling material makes a connection between the electrodes resp. between
the electrode and the metallic wall of the container resp. pipe, an measurable current flows, that causes a
reaction of the connected evaluation device.
Due to the use of a alternating voltage the corrosion at the electrode and the electrolytic decomposition of the
filling material is avoided.
At the electrode probes an additional module (diode module LBM) for the wire supervision can be installed inside
the housing.
In the case of a wire break between electrode probe and a suitable evaluation device, the evaluation device can
output a corresponding warning signal.
