Data Acquisition Web

Advantages:

• Low cost.
• No moving parts, less likely to be broken.
• Wide temperature range.
• Reasonably short response time.
• Reasonable repeatability and accuracy.

Disadvantages:

• Low Sensitivity, usually 50 µV/°C (28 µV/°F) or less. Its low voltage output may be masked by noise. This problem can be improved, but not eliminated, by better signal filtering, shielding, and analog-to-digital (A/V) conversion.
• Accuracy, usually no better than 0.5 °C (0.9°F), may not be high enough for some applications.
• Requires a known temperature reference, usually 0°C (32°F) ice water. Modern thermocouples, on the other hand, rely on an electrically generated reference.
• Nonlinearity could be bothersome. Fortunately, detailed calibration curves for each wire material can usually be obtained from vendors.