Most of the thermistor is behave like a resistor with a high negative temperature coefficient. AT that time resistance decreases with the increases in temperature. So this property of thermistor enables to thermistor to detect very small changes in temperature as compared to RTD or thermocouple. So here this post gives the advantages and disadvantages of the thermistor to better understand this topic.
Advantages of thermistor:
- It is a small size
- Highly sensitive allows them to work well over a small temperature range
- They are more sensitive than other temperature sensors
- Easy to use
- They are fast in operation
- It has good sensitivity in NTC region
- Fast response over the narrow temperature range
- Cost is low
- Very responsive to changes in temperature
- High accurate
- Repeatable
- It does not require contact and leads resistance problem not occurred due to large resistance
- Options for customization
- Easily interfaced to electronics instrumentation
- it requires a standard two-wire connection system means they are compatible with many devices
Disadvantages of thermistor:
- Thermistor need for shielding power lines
- Extremely non-linear
- Passive
- The thermistor is not suitable for a large temperature range
- The resistance temperature characteristics are nonlinear
- Narrow working temperature range compared to other sensors such as RTD and thermocouple
- More fragile as they are semiconductor devices
- Susceptible to self-heating errors
- The excitation for large temperature range
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