* Question
| What are the characteristics of thermal resistance compared with thermocouples? |
* Answer
| 1 The output signal is large at the same temperature and is easy to measure.Measuring millivolt-level electromotive force is obviously not as easy as measuring tens of ohms.
2 The resistance must be measured by means of an external power supply.As long as the thermocouple has a temperature difference between the hot end and the cold end, an electromotive force is generated, which is a power generation type sensor that does not require a power source; the thermal resistance must pass current to reflect the resistance change, and the power supply cannot operate.Since the thermal resistance must be wound around the insulating support with a thin wire, the physical properties of the material at high temperatures limit the upper temperature range. |
COMMENTS