1) Thermal potential:
When heated,the closed circuit voltage should ≥12mv and ≤15mv,open circuit voltage ≥25mv and ≤30mv
Heat potential should ≥12mv and ≤15mv when temperature ratings 416° to 760°C, cold junction to hot junction
Cooling Characteristic ≤ 1.5 mv when 1.5min if it heated for 5min and then cut off the power.
2)Ambient temperature: the top temperature is lower than 760℃ and the other parts lower than 200℃
3) Inner resistance: Accord to its type and length and the tolerance is in ±15% as is requested.
4) Length：according to request of customers
Forehead & terminal：according to request of customers