CONTENTS 



xm 



icrowave Refracto 

 in Liquids or 



1-67. Sonic Systems .... 

 1-68. Transportation-of-charge Methods 

 1-7. Humidity Transducers .... 



1-71. Resistive Transducers Responding to Humidity in 

 Gases ...... 



(a) Resistance-variation Systems 



(b) Thermal System (Dewcel) 



(c) Electrolysis System 

 1-72. Dielectric Systems 



(a) Capacitive System 



(b) Operation at Microwave Frequencies (M 

 meter) ...... 



1-73. Systems for Humidity Determination 

 Solids ...... 



(a) Dielectrical Systems 



(b) Nuclear-magnetic-resonance Method 



Chapter 2. Temperature Transducers 



2-11. Resistive Temperature Transducers (Resistance Ther 

 mometer) ...... 



(a) Metallic-resistance Temperature Transducers 



(b) Semiconducting-resistance Temperature Transducers (Ther 

 mistors) .....-■■ 



(c) Electrolytic-resistance Temperature Transducers 



(d) Ionized Gases ...... 



Inductive Temperature Transducers . 



(a) Variation of Susceptibility of Paramagnetic Salts 



(b) Permeability and Eddy-current Losses . 

 Capacitive Temperature Transducer 

 Thermoelectric Transducers (Thermoelements or 

 Thermocouples) .... 



2-15. Noise Thermometer 



Chapter 3. Magnetic Transducers 



3-11. Induction Systems, Search Coils 



(a) Stationary Search Coils 



(b) Moving Coils .... 



(c) Special Search Coils 



(d) Magnetomotive -force Transducer Coil 

 3-12. Systems Based upon Magnetic Effects on Moving 



Charges ....... 



(a) Rotating Disk ...... 



(b) Induction in Moving Conducting Liquids 



(c) Magnetron Tubes ..... 



(d) Electron-beam Magnetometer 



(e) Hall-effect Transducers .... 

 (/) Magnetoresi stive Transducers 



3-13. Transducers Based on Permeability Variation 



(a) Inductance Variation ..... 



(b) Time Variation of Magnetic Permeability 



(c) "Even-harmonic" Method .... 



(d) "Peaking Strips" ..... 



2-12. 



2-13. 

 2-14. 



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