The distinction between the K type thermocouple is negative

Many different kinds of thermocouple, the K type thermocouple is above 500 ℃ temperature zone dosage biggest metal thermocouple, its usage is the sum of other metal thermocouple. Today we will learn about the armoured thermocouple how points are negative.

we are to understand what is negative in the first place. The anode ( KP) In the name of the chemical composition is: Ni: Cr material 90:10, the cathode ( KN) The chemical composition of the is: Ni: Si material 97.

K type thermocouple linearity, thermoelectric emfs is bigger, so can be used for oxidizing, inert atmosphere. But K type thermocouple cannot be directly used for sulfur, reducing or at high temperature reduction, oxidation atmosphere and vacuum alternately, is also not recommended for people with weak oxidizing atmosphere.

it is very nickel-chromium alloy (containing 10% chromium KP) , the negative is extremely containing silicon 3% nickel silicon alloy ( KN) 。 Therefore, armoured thermocouple how points are negative? Based on this feature, use the magnet can be easily identified armoured thermocouple of positive and negative pole.

if the above methods, the rest of the thermocouple is negative, is also very simple to distinguish.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure thermocouple sensor, digital temperature thermocouple sensor