ALM-Inline Manual V1.0
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Chapter 4 Protect your oxygen sensor
Installation
Correct installation of the oxygen sensors is a must to avoid sensor damage. It protects
the oxygen sensor from condensations and gives the sensor longer life. It also can 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 10o~75ofrom the horizontal
line (see below figure). The typical tilt-angle is 30o. 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 narrow band 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-Inline, which controls the LSU heater. Otherwise,
long-time-running engine with LSU sensor not heated can cause damage of the
sensor.
LSU sensor is preferred to run within the temperature range of 500~900oC, the best
temperature is 780oC. Too high temperature (>1030oC) will cause damage of the
sensor. Refer to Bosch LSU 4.9 data sheet for more details about the variant
temperature requirements.
http://www.etas.com/en/downloadcenter/5858.php
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 of the sensor.
The preferred order: start the engine first, then immediately turn on the ALM-Inline,
which will ramp up the heating power smoothly.
