上游充通大学 SHANGHAI JIAO TONG UNIVERSITY Semi Conductor O=0 exp(-△E/kT) R=- 次=A+AInR+AnR) Precision can reach 0.01C
Semi Conductor Precision can reach 0.01oC 3 0 1 2 0 ln (ln ) 1 1 exp( / ) A A R A R T R E kT = + + = = −Δ σ σ σ
Thermistor Advantages and SHANGHAI JIAO TONG UNIVERSITY Disadvantages Advantages: Disadvantages: ·Very sensitive(has Output is a non- the largest output linear function change from input Limited temperature)0.01C temperature range. Quick response Require a current More accurate than source RTD and Self heating Thermocouples 。Fragile
Thermistor Advantages and Disadvantages Advantages: • Very sensitive (has the largest output change from input temperature)0.01 o C • Quick response • More accurate than RTD and Thermocouples Disadvantages: • Output is a nonlinear function • Limited temperature range. • Require a current source • Self heating • Fragile