The V-PAD® model TC59-V provides accurate and reliable temperature readings of process tubes inside combustion furnaces. Through extensive testing at WIKA’s R&D centre in Houston, Texas, the V-PAD® has been designed to provide unmatched accuracies in varying process conditions.
At the heart of the V-PAD® thermocouple is a patent pending V-shaped block designed to enable a full penetration weld between the sensor and the process tube. The flexible part of the sensor is a mineral-insulated metal-sheathed cable. It consists of a metal outer sheath which contains the insulated internal thermocouple conductors compressed within a high-density ceramic composition. The materials of the thermocouple can be selected to match the application.
Inside the V-PAD® block, the internal conductors are welded together to form a non-insulated (grounded) measuring point. The other end of the mineral-insulated metal-sheathed cable provides a hermetically sealed platform for the electrical connection. Cables, plug-in connectors, or connector sockets can be connected here.
The V-PAD® thermocouple can also be fitted with a diagnostic junction which can be used for diagnostics of the measuring junction and environmental conditions.
Sensor design
This tubeskin thermocouple assembly is supplied with a non-insulated measuring point (grounded).
Only in this way it is possible to ensure that the temperature-sensitive measuring point becomes part of the tube surface when welding the V-PAD® to the tube. This enables the most accurate measuring results.
