Thermistors are also resistance devices, but they're made of semiconductor material rather than platinum wire. Because of their high sensitivity, thermistors usually require only two-wire connections. A thermistor probe is the best choice when you need the highest resolution, that is, when you want to measure small changes in temperature. If you're tying to measure the temperature coefficient of a component such as a crystal over a narrow temperature range, then use a thermistor. Thermistors rival RTDs in accuracy and have better resolution than other sensors.
Thermistors have a narrow temperature range compared to thermocouples and RTDs.
IC temperature sensors contain not only a temperature sensor but also signal-conditioning circuits. These sensors will produce a voltage or current output that is linearly proportional to temperature. Some even digitize the temperature and produce serial outputs. Most of these devices are packaged in standard IC packages for mounting on circuit boards and they all require a DC voltage source, typically 2.7 V to 5 V. IC temperature sensors may require you to design your own electronics to digitize the analog output or to interpret the digital serial output. Sensor manufacturers provide application notes with sample schematics to help you with your design.