Labfacility provides the best range of thermocouple extension leads which can be used to increase the length of thermocouple cable so that you don't have to change with the longer length cables. They are available in two types Miniature and Standard connectors with the only difference between them being that miniature has flat plug pins with small sockets and standard has solid, round plug pins with standard sockets. Both the connectors are thermocoupled to avoid incorrect connection and are IEC colour coded. These are available in 2m, 5m, and 10m cable lenghts with K,T,J, & N types of thermocouple. These cables are PVC insulated placed alongside with tolerance class 2. Their insulation rating ranges from -10 to 105°C.