LAMBDA controller - LCA80

Product LAMBDA controller - LCA80 is separate module for control and signal processing of wideband lambda probe type LSU 4.9 a LSU 4.2.

We supply along with matting connector including accessories (terminals, sealings) and USB cable for PC connection.

LAMBDA controller - LCA80

215.38 € with VAT

Technical Specification

Lambda Controller can be used for:
-  Combustion engines of automobiles
-  Cogeneration units = CHP
-  Boilers for gas combustion or biomass

LAMBDA controller is based on circuit BOSCH CJ125 which serves basic function of oxygen sensor along with supporting microprocessor for filtering and control. Microprocessor also provides forwarding data to the diagnostic interface USB or CANbus in protocol SAE J1939. Lambda probe heater is controlled by PID regulator and the resistance of measuring cell (Nerns Cell) with auto-off option according to engine speed received from CANbus.

LAMBDA controller processes and visualizes data about Lambda mixture – λ, Oxygen – O2, Ratio – A/F, Probe temperature – T [°C], Supply voltage – U[V] and Engine speed – RPM.

LAMBDA controller can be directly included in the ECU MASTER unit as extened module. This solution is possible only for units with four outputs, such as MASTER 4TCI or MASTER 2CDI 2TCI. For units with ten outputs is possible connection by CANbus – J1939 interface.


  • Supply voltage range 7 až 36V (12V/24V)
  • Consumption 10W (probe heater)
  • Operation temperature -40 až 85°C
  • Support for Lambda probe type: LSU 4.9 a LSU 4.2
  • Used BOSCH CJ125 circuit and microprocessor support
  • Ratio – A/F: Gasoline, Diesel, Methanol, Ethanol, E85, LPG, CNG, Hydrogen
  • Visualization:
    • Lambda – λ ............ 0,7 to 12,5 (± 0.1%)
    • Oxygen – O2 ........ -7,5 to 20% (± 0.1%)
    • Ratio – A/F ....... (Gasoline, Methanol, Ethanol, LPG, Diesel)
    • Temperature – T [°C] .... -40 to 1050°C (± 3°C)
    • Supply voltage – U ....... 7 to 50V (± 2%)
    • Engine hours ................ [h:m:s]
  • CANbus support at protocol SAE J1939 (250kbps)
  • Supported connection or integration with ECU MASTER
  • Galvanically isolated USB – USB protection against earth fault and EMC disturbances
  • PC application – to visualize measured values
  • Measuring the supply voltage
  • Connector – TYCO automotive
  • Protection class – IP65
  • Dimensions 105×50×37mm

Connector wiring

MarkingMeaningRange, Active level
+ Power supply 7 – 36V
G Ground supply 0V
CAN bus SAE J1939 / 250kbps
AO Analog output 0-5V, 0-10V, 0-20mA and 4-20mA
  LSU 4.9 (LSU 4.2)  
IP (red) Lambda LSU - pin 1 (6*) IP/APE - pump current shunt input
VM (yellow) Lambda LSU - pin 2 (5*) VM/IPN - virtual ground output
HEAT- (white) Lambda LSU - pin 3 (4*) Uh-/H- - heating +
HEAT+ (grey) Lambda LSU - pin 4 (3*) Uh+/H - heating +
IA (green) Lambda LSU - pin 5 (2*) IA/RT - pump current control output
UN (black) Lambda LSU - pin 6 (1*) UN/RE - inverting input of pump

* Index of pins depends on Lambda probe type

Application LAMBDA control – visualization software

Visualization is done from application LAMBDA control run on your PC. The application works under Windows 95 and higher. Installation requires 4MB of free space at your hard disc.

To connect lambda to PC is used USB interface. Driver for USB is included on the installation CD.

Visualized information

  • Revolutions [rev/min]
  • Lambda – λ
  • Oxygen – O2
  • Ratio – A/F
  • Temperature – T [°C]
  • Supply voltage – U [V]
  • Analog output – AO [V]
  • Engine hours [h:m:s]

Software screen preview

AFR – Air Fuel Ration

Table Air Fuel Ration


Name Date File
Certificate – Radio disturbance characteristics; Immunity characteristics 27.07.2021 Download
LAMBDA_AnalogOUT r8_5 [pdf, 180kB] 24.06.2021 Download
LAMBDA_AnalogOUT r8_5 [xls, 183kB] 24.06.2021 Download
J1939_CANopen_Protocol [pdf, 50kB] 17.04.2019 Download
Manual_EN_LAMBDA controller - LCA80 [pdf, 900kB] 11.01.2018 Download
Lambda Bosch LSU 4.9 data sheet 16.05.2017 Download

Application Software

Name Date File
LAMBDA control V9.4 [zip, 774kB] 24.06.2021 Download
USBdriver_v2.12.24 [zip, 1335 kB] 21.02.2017 Download

Available Variants

Name Cena s DPH  
LAMBDA controller - LCA80 – Type basic 215.38 €

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