RoastLog requires a type-K thermocouple for our 1-input Data Bridge.  Our 4-input Data Bridge is compatible with either type-K or type-J.  Any thermocouple you use must be ungrounded.

There is a lot of detail around thermocouples, which would make this FAQ a bit too long. Head on over to our blog post about thermocouples for all of the nitty-gritty details.

Furthermore, there is a diagram of color codes on Omega Engineering's website if you'd like to figure out which type you have.