Use of temperature monitoring plasma widget
You can use the Temperature Monitor Widget on your MAC to access the temperature sensor readings that your computer uses. If you have some other temperature sensor applications on your pc, this widget helps you select which one to display on your dashboard.
It can also be used to process hardware calibration data that Apple stores so you can be sure that the readings you are getting are accurate.
Click this link to know more about this widget and to download it for free.