wika V-PAD tube skin thermocouple assembly Model wika TC59-V
Applications
■■ Chemical industry
■■ Superheated steam applications
■■ Refineries
■■ Heating furnaces and high-performance boilers
■■ Heat exchangers
Special features
■■ Application ranges from 0 ... 1,200 °C
■■ Flexible sheathed cable, mineral-insulated internal leads
■■ High mechanical strength, shock resistant
Description
The patented WIKA V-PAD enables the surface temperature of a pipe within a combustion furnace to be measured accurately. The name V-PAD is derived from the shape of the sensor. It is V-shaped and enables a welded connection to be made between the sensor and the pipe. In the V-PAD, the flexible part of the sensor is a mineralinsulated cable (sheathed cable). It consists of a metal outer sheath, which contains the insulated internal leads, compressed within a high-density ceramic composition. The
internal leads are made from thermo material. The material of the outer sheath can be selected to match the application. At one end of the sheathed cable, the internal leads are welded together. For the versions with a non-insulated (grounded) measuring point, the sheath is welded to the thermocouple. At the other end of the sheathed cable the ends of the leads are connected and the sheathed cable is
hermetically sealed using a sealing compound. The lead ends form the platform for the electrical connection. Cables, plug-in connectors or connector sockets can be connected to them.
Sensor design
The tube skin thermocouple is supplied with a non-insulated measuring point (grounded).
Only in this way it is possible to ensure that the temperaturesensitive measuring point is positioned as close as possible to the pipe surface. By welding the V-PAD to the pipe, the measuring point becomes part of the pipe surface and provides the most accurate measurement results.