What do types K, E, J and T designate ?
These are designations for common thermocouple types. A thermocouple consists of two wires of different composition. When one end of each wire is in electrical contact at that end of the pair of wires is at a temperature different from that at the other end of the wires an electromotive force is generated that can be used to measure the temperature. These four types of thermocouples can be used with YMI thermometers. However, YMI only supplies Type K temperature probes. It is necessary to change a setting in the main unit when using any of the other three types of thermocouples.