PROPERTIES OF THERMISTORS.
Abstract
The characteristics of thermistors, semi-conductors with large negative temperature coefficients of electrical resistance, are reviewed and compared with standard resistance thermometers. Descriptions are given of the various sizes and shapes commercially available, thermal limitations in their use, and the various materials used in manufacture. Other uses for thermistors, such as temperature control, electrical regulation, and measurement of other variables are considered. Classification of semi-conductors and the theory of operation is discussed and an expression for electronic conductivity is developed from which a method is proposed for the comparison of various thermistors. Steady state and transient thermal errors are evaluated, and factors affecting calibration stability are described. Recommendations for selection of thermistors and proper circuitry are given. A selected bibliography on thermistors is given. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1967
- Accession Number
- AD0818017
Entities
People
- John A. Clark
- Yotaro Kobayashi
Organizations
- Massachusetts Institute of Technology