ALM-BR4-4.3 Manual
5
Copyrights ECOTRONS LLC www.ecotrons.com
Oxygen Sensor Protection
Installation
The correct installation of the oxygen sensor is a must to avoid sensor damage. It
protects the oxygen sensor from condensations and gives the sensor a longer life. It can
also make the measurement more accurate. The sensor body should be perpendicular
to the exhaust gas flow, and it should also be tilted in the range of 10
o
~75
o
from the
horizontal line (see below figure). The typical tilt-angle is 30
o
. The sensor head should be
close to the center of the exhaust pipe.
After finding the right location on the exhaust pipe, drill a hole of 18mm in diameter.
Weld the sensor bung on it.
Note: do not weld the bung with the sensor in it.
Note, if your vehicle has a Bosch narrowband oxygen sensor (LSF) on your vehicle, you
can just un-plug the LSF, and plug-in the wideband LSU sensor into the same hole.
Bosch LSU and LSF have the same size of the thread.
More User Notes
LSU sensors are not designed to work with leaded gasoline. Using LSU sensor with
leaded gasoline will reduce the sensor life.
With the LSU sensor installed in the exhaust pipe, whenever the engine is running,
please also run ALM-Board, which controls the LSU heater. Otherwise, a long-time-
running engine with LSU sensor not heated can cause damage to the sensor.
LSU sensor is preferred to run within the temperature range of 500~900
o
C, the best
temperature is 780
o
C. Too high temperature (>1030
o
C) will cause damage to the
sensor.
Avoid heating the LSU sensor before the engine is running. At the engine start,
there may be condensations in the exhaust gas, which can cause damage to the
sensor if the sensor is heated. The preferred order: start the engine first, then
immediately turn on the ALM-Board, which will ramp up the heating power smoothly.
