Bosch LSU ADV lambda sensor
The Bosch LSU ADV lambda sensor is the next generation wideband oxygen sensor. Compared to the older 4.9 (and 4.2) sensor the LSU ADV is more accurate at wider working temperature range. It also heats up quicker.
It is now the recommended sensor for motorsport applications.
- 7.4 AFR to 25.5 measurement range
- Accuracy <0.1AFR
- Simple to install and operate
- 0-5V Analogue Output
- 100% Accurate digital signal between Controller and Display
- Uses PID algorithm to control probe temperature
- Initial Heat up of sensor designed according to Bosch specification
- Immediate sensor turn-off under fault condition to protect sensor
- 3D Printed enclosure
- Good visibility, fast response screen
- Adjustable brightness
- 0-5V Signal input or LDperformance digital signal (automatically recognised)
- Big digit size – 1 inch, instead of the common 0.56".
- Size: 78mm x 40mm
- <0.5% accurate voltage reference
- Separate voltage reference from display supply
- 10bit ADC with improved resolution using successive approximation algorithm
- Hardware and software noise filter
Brightness can be controlled using a potentiometer connected as shown below.
Or alternatively, to dim the display just connect 12V to the "12V Brightness" port of the connector.
How to use
- Connect Bosch LSU ADV oxygen sensor using the extension lead to the Controller
- Connect 12V and GND to the corresponding terminals of the Controller and AFR display
- Connect one of the Controller signal wires to the AFR Display input
The analogue 0-5V output corresponds to 7.35AFR to 22.39AFR. To convert from voltage to AFR use the formula: V*15.04/5+7.35. The output is compatible with many Wideband AFR displays as well as the LDperformance AFR display.
During the initial heat-up phase of the sensor, the output will toggle 10AFR, 20AFR. This is done to verify the accuracy of the signal and the gauge.
The Digital Output works only with the LDperformance AFR display and is used to 100% accurately display AFR on the gauge.
The LDperformance AFR display has a single input which can automatically detect if analogue or digital signal is connected.
By integrating the CJ125 chip which is specifically designed by Bosch for their lambda sensors, faster response times and more accurate readings can be achieved. The kit also uses the best and newest lambda sensor technology LSU ADV which is the successor of LSU 4.9
No user calibration is required for proper operation.