Thermocouple
Advantages - Passive Inexpensive Rugged Temperature Range
Disadvantages - Low voltage as output Required Cold junction compensation Variable accuracy
RTD
Advantages - High accuracy High stability
Disadvantages - Expensive Requires excitation Low resistance as output Self heating
Thermistors
Advantages- High resistance High sensitivity
Disadvantages - Highly non linear output Limited operating range Requires excitation Self heating
Fiber bragg grating
Advantages - Passive Electrically non-conductive Environmentally stable Requires excitation Self heating
Disadvantages-Expensive Problems in installation Not widely adopted