I am attempting to setup a Lamba sensor (O2 sensor) on a biomass boiler flue to continually monitor fuel:air mix ratio (via residual O2 left in the flue products).
I am trying to work out the best cost effective route to achieve this using an Arduino.
I was thinking of using a Zirconia based sensor such as the one below. They are relatively cheap and readily available however I need to work out how best to interface this.
In an ideal world I would be able to get a 0-5V linear signal from the sensor that can feed directly into the Analogue inputs of the Arduino but from my research so far it does not seem to be that simple.
I have found the following interface module but it is prohibitively expensive for the home project I plan to use it for so am looking for more cost effective solutions.
Does anybody have any experience with this application or ideas?