Sensor Installation Handbook Preface 3rd edition - Siemens ...
Sensor Installation Handbook Preface 3rd edition - Siemens ...
Sensor Installation Handbook Preface 3rd edition - Siemens ...
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Electrical resistance sensors<br />
Metals change their resistance (measure in ohms) with a change in<br />
temperature.<br />
The change in resistance per Kelvin (K) is different for every metal,<br />
and is used directly as an output signal.<br />
Material Construction Function System<br />
Platinum Electrical<br />
Nickel resistance, R,<br />
in ohms Ω<br />
There are two types of change in resistance:<br />
PTC: Positive temperature coefficient<br />
Rising temperature = increased resistance<br />
Falling temperature = reduced resistance<br />
NTC: Negative temperature coefficient<br />
Rising temperature = reduced resistance<br />
Falling temperature = increased resistance<br />
Temperature<br />
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