Advantages and disadvantages of thermocouple

Advantages:

There are some advantages of thermocouple which are given below.

• The thermocouple is less expensive than RTD.
• It has wide temperature ranges.
• It has good reproducibility.
• The temperature range is 270 to 2700 degree Celsius.
• It has rugged construction.
• It does not required bridge circuit.
• It has good accuracy.
• It has high speed of response.

Disadvantages:

There are some disadvantages of thermocouple which are given below.

• The stray voltage pick up is possible.
• As output voltage is very small, it needs amplification.
• The cold junction and lead compensation is essential.
• It shows non linearity.

Thermocouple