From one of my suppliers, it's a nice gauge. I was thinking about installing one on my 8.
It's based on a Bosch LSU linear lambda sensor. All the electronics (heater driver, signal converter, display) are contained within the bezel.
It has two possible outputs for a datalogger or a piggyback/stand alone ECU :
- 0-5V output ;
- serial output.
The price for the whole kit (including sensor) is only 2,6 times the price of the sensor alone!
Fabrice