When using a NTC as a temperature sensor be careful to not running too much current though it, since the current will heat the NTC and introduce a measurement error. For this reason, high value NTCs (10 kΩ or more) are better for thermometers.  NTCs are usually not factory calibrated and the actual R25 and B25/100 can […]

Good resources http://circuitcellar.com/editorsblog/the-basics-of-thermocouples/  

Also called resistance temperature detectors or resistive thermal devices (RTDs). Good for temperature ranges of -200 to +600ºC. Temperature sensors that exploit the predictable change in electrical resistance of some materials with changing temperature. They are usually made of platinum and often called platinum resistance thermometers (PRTs).  They are often more suitable than thermocouples in […]

Good Thermistor Calculators http://www.thermistor.com/calculators.php http://www.absorblearning.com/media/attachment.action?quick=pq&att=1843