Anyone ever used one of these EGT gauges?

[Liquid Force]

Looking for an EGT gauge to moniter two engines, I have limited dash space and want something that can handle four egt probes, this is up on ebay looks like it could do the trick, was designed for an aircraft, would the probes handle use in salt water enviroment??

http://cgi.ebay.com/ebaymotors/Aircraft-4-Cylinder-EGT-Probes-TSOd-STCd_W0QQitemZ330024742815QQihZ014QQcategoryZ26436QQrdZ1QQcmdZViewItem