Sensing elements and wire materials for RTDs

In order to select the suitable detector, what materials should be used as sensing elements and wire materials for RTDs?

Sample Solution

RTD’s contain a sensing element which is an electrical resistor that changes resistance with temperature. The sensing element in an RTD usually contains a platinum wire or film, a ceramic housing and ceramic cement or glass to seal the sensing element and support the element wire. Typically, platinum sensing elements are able to be exposed to temperatures up to approximately 1200°F. The wires which connect the sensing element to the readout or control instrumentation are usually made of materials such as nickel, nickel alloys, tined copper, silver plated copper or nickel plated copper. The wire insulation used also directly influences the temperature the RTD can be exposed too.

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The audit sub processes, particularly in planning and field work, include contingencies such as business type, employee skill level, applicable laws, available audit workforce, available technology and systems, and deadline

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