How to distinguish J type & K type hot runner thermocouple

How to distinguish J type and K type hot runner thermocouple?

Today we share from below points:

1. Material: 

J type thermocouple :  iron (positive), nickel (negative);

K type thermocouple:  chromium (positive) aluminum (anode)

2. The number of feedback signals is different when the temperature is detected

J type thermocouple :tens of  hundreds times per second

K type thermocouple: Dozens to hundreds of times per second

3. J type is grounded thermoucouple, K type is non-grounded thermocouple.

4. J type is positive magnetic, K type thermocouple is negative magnetic.

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hot runner K type thermocouple