Remote Temperature Monitoring to IPad

[CaptTPT]

Want to develop a system to monitor temp at several sites and transfer data wireless to iPad or desktop or laptop computer for continuous monitoring. Looking to monitor exhaust manifolds, alternators, engine oil, batteries, shaft seal housing, etc, etc. Looking to do something like outlined in article in Sea - "Reading the Heat" April 17, but would like to transfer date wirelessly. Ok with spending more the $50 he did. Nice system though.
Suggestions for building such a system please. I'm guessing others have done this successfully. Can anybody direct me to discussions about building such a system?
Tom