AS temperature sensing elements, thermistors have been in use for more than four decades. They have become quite useful in stabilizing electronic circuits and measuring temperature. They are used as surge protectors for electric motors and electrical power devices as well as fluid level sensing elements. Improvements in technology and manufacturing methods expanded their usefulness for higher temperature applications.
This paper will offer an overview of various oil level sensing technologies and then will examine the characteristics of thermistors and their use as low oil level sensors for engines.