Thermocouples Attachment Unit

Thermocouple Attachment Unit (TAU) provides a reliable and extremely accurate method of temperature measurement of pre and post weld heat treatment processes by the direct attachment of thermocouples to the workpiece known as the capacitive discharge method.

Previous methods of thermocouple attachment where the two conductors, comprised of two thermocouple materials, were welded or brazed/soldered at the tip to make a ‘hot’ junction, lead to large inaccuracies in the temperatures being recorded.

The solution is to produce the ‘hot’ junction by welding the conductor wires directly and independently on to the metal surface as facilitated by IHT’S TAU. By adopting this capacitive discharge method of welding the conductors on to the metal surface, serious errors arising from the proximity of a heating source are avoided.

A rechargeable battery provides power to flash-discharge, butt-weld the ends of the thermocouple wires directly to the surface of a welded workpiece. The wires are spaced 6 mm maximum apart.

This causes the workpiece material itself to become the junction of the thermocouple. There can therefore be no inaccuracy in the temperature measurement. Heating elements can lay on top of any part of the thermocouple junction or wires without any adverse affects on temperature measurement.