K Type Thermocouple:

Element Combination:

Positive Leg:  Nickel – 10% Chromium

Negative Leg: Nickel – 2%Aluminium, 2% Manganese, 1% Silicon

Temperature: 

0-1260 ºC

32-2300 ºF

Application:

• Recommended for continuous oxidizing or neutral atmospheres. Mostly used above 538 °C [1000 °F].
• They are one of the more inexpensive thermocouples with good resistance to oxidization, god linearity of measurement, and stability.
• Subject to failure if exposed to sulphur. 
• Preferential oxidation of chromium in positive leg at certain low oxygen concentrations causes ‘green rot’ and large negative calibration drifts most serious in the (816 to 1038) °C [1500 to 1900] °F range. 
• Ventilation or inert-sealing of the protection tube can prevent this