Apple stopped online service but this should point you to the right sensors --> HWSensors.6.26.1440.Binaries this is a freeware , recommendation is to buy a PRO version and to suport development of the tool.
I also have board View, please request as this is exe file
this is board J44 MLB-4GB. The schematic doesn't specifically reference 820-3436 , so I would assume it's valid for several boards.
Airport proximity on the board is non existing , so if you have 129 reads on it , just ignore it.