SUBJECT INDEX 



323 



Temperature transducers, noise 

 thermometer, 174-176 

 resistance thermometers, 154—160 

 circuits for, 155 

 construction, 158-159 

 influence of measuring current, 

 160 

 resistive systems, 154-165 

 electrolytes, 164 

 metallic resistance thermometer, 



154-160 

 semiconductors, 160-164 

 thermal ionization, 164-165 

 thermistors, 160-164 

 thermoelectric systems, 167-174 

 titanates, 166-167 

 Thermal method for measurement of 

 displacement, 72-74 

 electric rf field strength, 232 

 gas -flow velocity, 127-132 

 humidity, 143-144 

 liquid-flow velocity, 123-125 

 liquid level, 100-101 

 magnetic rf field strength, 210-211 

 pressure, 109-112 

 radiation, 274-281 



radiation bolometers, 278-280 

 radiation thermoelements, 



274-277 

 thermionic detector, 281 

 vacuum, 109-112 

 Thermionic emission, in photo- 

 emissive systems, 238-239 

 in photomultipliers, 251-252 

 Thermistors, 160-164 



characteristic values at different 



temper at vires, table, 162 

 comparison with metallic resistance 



thermometers, 163 

 for high temperature, 163 

 voltage-current characteristic, 162 

 Thermoelements (thermocouples), 

 167-174 

 basic system, 167 

 extension wires for, 172 

 jaroperties, table, 171 

 protective tubes for, 172 

 for radiation measurements, 

 274-277 



Thermoelements (thermocouples), 

 reference- junction tempera- 

 ture, 172-174 

 compensation of variation, 

 173-174 

 technical preparations, 170-172 

 thermal emf measurement, 168 

 thermoelectric sensitivities, table, 

 169 

 Thermo-Stromuhr, 123-125 

 Thickness gauges, 7-23 



based on current flow pattern, 9-10 



contact squares, 9, 10 

 based on voltage breakdown, 16-17 

 capacitive system, 14-15 

 inductive, 11-14 



eddy-current systems, 11, 13, 14 

 magnetic-shunt system, 12-13 

 permeability-variation system, 13 

 reluctance- variation systems, 12 

 radiation systems, 17-23 

 absorption, 18 

 alpha, 17-19, 21-22 

 backscatter, 18 

 beta, 17-19, 21-22 



isotopes for, table, 21 

 gamma, 17-20 

 isotopes for gamma and X-ray 



gauges, table, 19 

 mass absorption coefficient of 



X-rays, 19-20 

 X-ray, 17-20 

 resistive, 7-9 



guard-ring arrangement for, 8-9 

 ultrasonic method, 17 

 Thimble ionization chamber, 287-288 

 Threshold mobility of ions, 219 

 Threshold wavelength, of photo- 

 conductors, 264 

 of photoemissive cathodes, 234-237 

 of photovoltaic cells, 271 

 Time dispersion in photomultipliers, 



249 

 Transfer characteristics, 3 

 Transfer function, definition, 3 

 Turbulence transducer, 120 



Ultraviolet-sensitive transducers, 

 photoconductive, 264 



