Most of the wide-band single wire O2 sensors are 0-5 volt devices. However, they have high impedance outputs, which means you have to connect them to a high impedance input - in the megohm range. Otherwise you load down the sensor output and get no useful information. Most analog voltage inputs for tach, oil pressure, etc. are usually 15Kohm and not suitable for direct connection to a single wire O2 sensor. A buffer amplifier is needed to make the impedance transfer. Apparently the Xtreme EFIS has the proper buffer amplifier built in.
The O2 sensors that use a controller will usually have a 0-5 volt output for data loggers. These will usually have a dedicated display also. The controller type O2 sensors usually have 4 or 5 wires and have to be dedicated to a particular controller. The 0-5 volt output from the controller is way downstream and isolated from the O2 sensor. Bottom line here is: If you are not sure about the electronics set up, use the packaged system (The O2 sensor, controller, display and harness) from one vendor. Most systems have choices for display type (analog or digital) and data logger outputs for your own custom display and/or recording. And the standard disclaimer: 100LL contains lead that will clog the O2 sensor in about 100 hours operation and render the sensor as a throw-away. Sid Wood Tri-gear KR--2 N5242 Mechanicsville, MD, USA [email protected] ------------------------------------------------------------------ Hi Sid Just a note on mixture meters, I was looking over the MGL websight the other day and noticed that their Xtreme EFIS has that facility built into it. All it needs is an O2 sensor hooked up to it. It would appear the Xtreme is also a full EIS with data logging facility for later engine analysis. With built in GPS it seems a good bang for your buck. It also fits into a standard large instrument hole. Regards Dene Collett Avlec Projects Port Elizabeth South Africa. ------------------------------ Hi Gang, contacted Dynon on this issue and they don't support it. They have Variable voltage inputs though so if you could amplify the O2 sensor output to Zero-to-5v it possibly could be done. Paul Smith Brisbane, AUSTRALIA [email protected] http://kr2spacemodulator.blogspot.com/
