The high nominal resistance, positive temperature coefficient and linear sensi-tivity characteristics of TD Series temper-ature sensors simplify designing the elec-trical interface.
Figure 4 is a simple circuit that can be used to linearize the voltage output to within 0.2% or a ±0.4°C error over a range of −40° to +150°C (−40° to +302°F).
Figure 5 illustrates an interface for appli-cations requiring a voltage that varies lin-early with temperature. In the example shown, the current regulator sensor re-sistance can be affected by temperature, so only the temperature sensor should be exposed to thermal changes.
In some applications, it may be desirable to detect one particular temperature. Fig-ure 6 illustrates one way this can be ac-complished. In the comparator circuit shown, the potentiometer can be adjust-ed to correspond to the desired temper-ature.