Updated example code.

Support forum for the Lambda Shield designed to connect Bosch LSU 4.9 wideband oxygen sensors to Arduino projects.
Post Reply
User avatar
Posts: 264
Joined: 07 Mar 2015 18:09

Updated example code.

Post by Christian_Bylund » 25 Oct 2018 23:47

The calculations used in the example code should only be considered when operating at lambda levels near λ 1. Using this approximation outside the intended area of operation will result in a proportional error. The following table shows the accuracy between λ 0.750 and λ 10.119.


The calculation should be used for educational purposes and the accuracy is adequate when operating near λ 1. When measuring at much leaner or richer gases an improved method of converting the CJ125 output voltage is needed. A lookup table have been implemented to the example code to correct this error.
Best Regards,
Christian Bylund
Bylund Automotive AB

Post Reply