Temperature Sensors

Temperature is one of the most commonly measured physical quantities. From simple thermistors to precision RTDs, understanding temperature sensor characteristics enables accurate measurement and control.

Objectives

• Understand thermistor, RTD, thermocouple, and IC sensor characteristics
• Interface NTC thermistors with voltage dividers
• Linearize nonlinear sensor responses
• Implement cold junction compensation for thermocouples
• Select appropriate sensors for different applications

Key Takeaways

• Thermistors: low cost, nonlinear, limited range
• RTDs: high accuracy, more expensive, need excitation
• Thermocouples: wide range, need cold junction compensation
• IC sensors: easy interface, limited temperature range