I've got the Percy's dual channel EGT (digital) that Summit sells. There's only a few companies out there that make the actual meter, Omega is probably the biggest supplier. My Percy's unit is an Omega. Its a two channel digital with max function, hold, and delt-T between channels. You can only monitor one channel at a time or the difference between the two channels. I've got clamp-on probes in #1 and #6 right now. The Percy's also came with an extra thermocouple that I could use for head, intake, etc. I've been completely satisfied with the Percy's unit.
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Jeff Chambers
T/S #3
11.86 Seconds/113.8 MPH
Chambers Racing Team