i amdoing this project on temp measurement. i need to measure two temp's in the body range, i.e. 25-45 deg celsius. and make sure that the difference between these two temp's does not cross 4 degrees. now i need some idea regarding the temp measurement n how to go abt it. preferrably i would like to use thermistor n build my own circuit but i m open to ic's too but my budget is low. also if i could get any schematics? measurement has to be linear in the range of 25 - 45 degrees celsius.is there any other way other than these? the prob is that in the place that i am , the dealers sell the thermistors without knowing their range or sensitivity. so its a blind guess. if u suggest some IC could u please tell me how it will measure the temp,i.e. probe?
thank you
thank you