http://en.wikipedia.org/wiki/Resistance_thermometer
http://en.wikipedia.org/wiki/Thermocouples
When should command engineers role a Thermocouple or RTD?
RTD
RTD = resistance temperature detectors
below 600 °C
High accuracy
Low drift
Wide operating range
Suitability for precision application
The almost mutual of RTD is PT 100, R = 100 ohm at 0°C, sensitivity 0.385 ohm/°C
THERMOCOUPLE
H5N1 thermocouple is a junction betwixt 2 dissimilar metals that produces a voltage related to a temperature difference
hit −180 to 2,320 °C Sumber https://brunildedydondero.blogspot.com/