THERMOCOUPLE GP TYPE 2 - 120-4498 - 3516C

Thermocouple Type J, commonly referred to as Iron/Constantan(Fe/K), this is one of the few thermocouples that can be used safely in reducing atmospheres. However, in oxidising atmospheres above 550°C, degradation is rapid. Maximum continuous operating temperature is around 800°C, although for short term use, temperatures up to 1,000°C can be handled. Minimum temperature is -210°C, but beware of condensation at temperatures below ambient - rusting of the iron arm can result, as well as low temperature embrittlement.

The type J is also very common. It has a smaller temperature range and a shorter lifespan at higher temperatures than the Type K. It is equivalent to the Type K in terms of expense and reliability.

Temperature Range:

Thermocouple grade wire, -346 deg F to 1,400 deg F (-210 to 760 deg C)