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Title: Effect of electric current on thermistor temperature error
Authors: Massachusetts Institute of Technology. Dept. of Civil and Sanitary Engineering.
United States. Army. Corps of Engineers. New England Division.
Rohsenow, Warren M.
Stekly, John.
Keywords: Thermistors
Heat transfer
Heat transmission
Temperature measurement
Electric current
Dielectric current
Publisher: Arctic Construction and Frost Effects Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (Arctic Construction and Frost Effects Laboratory (U.S.)) ; no. 71.
Description: Technical Report
Summary: Thermistors used as temperature sensing devices develop internal heat by the passage of electrical current during measurements. A theoretical analysis of effect of internal heat generation is applied to one type of thermistor. Calculations of steady-state temperature rise over the ambient indicate that the magnitude of error for the thermistor located in soil, ice, light snow, medium snow, and heavy snow ranged from 6.5 x 10^-5 to 246 x 10^-5 °F, while the magnitude of error for the thermistor located in air ranged from 712 x 10^-5 to 1425 x 10^-5 °F, depending on the heat transfer coefficient. Calculations indicate that in most cases errors due to internal heating may be disregarded for ground and air temperature measurements.
Appears in Collections:Technical Report

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