TVS Diode Selection for Ambulance Circuit Load Dump and Overvoltage Protection

I'm designing a circuit for an ambulance for my volunteer ambulance corps, a basic temperature sensor reporting back values to a server. It's working great so far, but I'm worried about protecting the circuit from load dumps, spikes, and other over-voltage situations that I've read about in vehicles.

I've tried to do a lot of research on this, but can't find straightforward answers. Based on what I've found, it seems like a TVS diode can offer the protection I need?

Something like this? http://www.digikey.com/product-detail/en/TP6KE20A/F6845CT-ND/5492185

If in fact this will "do the job", are there any other considerations I need to take into account? Or is this sufficient and I'm all set?

Thanks!

You can use TVS diodes, but watch the power rating, transients on a 12v system in car may last for hundreds of milli seconds, so read the data sheets for the TVS carefully, below is a useful reference,
http://www.littelfuse.com/~/media/electronics...utomotive_tvs_diodes_application_note.pdf.pdf
cheers,
Richard