ALM-Inline Manual V1.0
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Chapter 1 ALM Product Overview
ALM (Accurate Lambda Meter) is a high-precision air-fuel-ratio (AFR) meter that detects the
air-fuel ratio of the exhaust gas by measuring the oxygen concentration in the engine exhaust.
ALM-Inline is one kind of our ALM products. ALM-Inline has a solid black plastic shell.
It is
more effective in preventing the circuit board from being damaged the volume is small. It
eliminates the sensor wire. the sensor connector is fixed to the plastic shell and the
appearance is more beautiful. it is more convenient to use.
ALM-Inline uses the Bosch CJ125 chip, which can accurately measure the oxygen
concentration that can be converted to λ, AFR or other parameters required by the user.
ALM-Inline uses a more advanced LSU4.9 oxygen sensor, rather than the LSU4.2 used by
most other air-fuel ratio analyzers, and ALM-Inline uses a closed-loop module to control the
temperature of the oxygen sensor to keep the LSU4.9 wide-area oxygen sensor temperature
accurately At 780°C. LSU4.9 is a new wide-area oxygen sensor developed from LSU 4.2,
which is superior to LSU 4.2, and Bosch has used LSU4.9 wide-area oxygen sensors for its
automotive inspection equipment.
Bosch chip CJ125 is the integrated chip (IC) specifically designed for LSU 4.9 Sensors.
Bosch's own wideband controller, "Lambda Tronic", uses CJ125 driver chip. In fact, Bosch
uses this chip wherever a LSU sensor is used. The CJ125 and LSU sensor are mated-pair by
Bosch. Presumably LSU sensors work the best with CJ125 chips.
See here for Bosch Motorsport’s wideband controller, LT4:
http://www.bosch-motorsport.de/en/de/produkte/catalog_products_1_760313.php
The link may be updated by Bosch, please use the link on our website.
ALM uses the LSU 4.9 wideband sensor by default, and it can also use LSU ADV wide-area
oxygen sensor, but need to update the software, if the customer wants to use LSU ADV
sensor, please explain in advance
