There are a number of benefits to using thermocouple temperature sensors; this includes its wide temperature range. For example, the most popular type of thermocouple is type K as it can be used in a very wide temperature range of between 0 and 1100 °C continuously. However, some thermocouples have a much higher temperature range, measuring over 2000 °C.
They are also very robust, especially when using mineral insulated cable. Thermocouples are a more simple device and versatile. You can have fast response versions or hand held probes, as well as types which are designed to be used in chemicals or harsh environments. Mineral insulated versions offer a very durable sensor which can withstand vibration and harsh environments