You all probably wondering how can I be hanging this out for so long.
I'll use work as an excuse. We've been busy, we're always busy.
Anyhow I was thinking how to map the voltage to a temperature. My first thought was to get a new battery for the laptop so I can sit in the car with the logger on, have it live to the lappy, dunk the temp sender into a hot cup of tea with a thermometer also in the cup, and log the temp to the voltage.
At the end I'd get a cold cup of tea so it wouldn't be all bad. (cold tea better than no tea)
I then thought I'd do some digging.
Looking at the table below it appeared that my 0 281 002 412 had very similar characteristics to the 0 281 002 170, which is also known as the NTC M12-H in motorsport circles.
I found the data sheet for this and got about doing some more digging (electrics are not my strength). I found some online help so I could turn my resistance into a voltage. The pull up resister is just a voltage divider, so with a bit of excel and GCSE physics I got....
The R-T software has the ability to take data and provide you with the equation (excel does this too) so I'm now thinking I just need to solder up the wires and I could possibly be good to go.
Fitting this will involve doing an oil change, who knows how long that could take...
Question is, do I cut the ring off the sensor and replace it with a ford rubber sump plug bit, or leave the ring on and nip it up as normal??