Type R thermocouple

Originally Posted by ehead14

Does anyone know how to salvage the platinum out of an old furnace thermocouple probe?

Mechanical destruction belt sander, bench grinder, shredder / hammer mill since the stainless steel used in this application as is the platinum are both none magnetic you will have to rely of gravity separation to separate the fractions.

The density of platinum is 21.45 g/cm³. This makes it one of the densest elements.

Originally Posted by ehead14

Does anyone know how to salvage the platinum out of an old furnace thermocouple probe?

Brute force.

The electrical current generated by a thermocouple can be used to open a relay to allow gas to flow for example to keep a pilot lit or convert the amount of electrical current being generated by the degree of heat applied into digital or analog showing exhaust temperature from an engine, pottery kiln to name a few uses.

A thermocouples working principle is based on the Seebeck effect, where a voltage is generated when two dissimilar metals are joined and one end is exposed to a temperature difference. This voltage, which is proportional to the temperature difference, is then used to measure temperature

The electrical current generated with a thermocouple would be measured in millivolts.

Originally Posted by ehead14

Any idea where the platinum actually is ?? Does it have to be refined at high temperatures? Can it be cut open to expose it?

Are you trolling me, as i read previously you had already removed the ceramic insert. The platinum is embedded in the ceramic. Do you know the difference between - milligrams, grams and kilograms.