EIA 337:1967 (R1981) General Specification For Glass Coated Thermistor Beads And Thermistor Beads In Glass Probes And Glass Rods (negative Temperature Coefficient) Establishes classification of glass coated thermistor beads and thermistor beads in glass rods by style, zero-power resistance, and resistance ratio, and delineates definitions, test methods, and perf