1. Passive Transducer: No generation of voltage Eg. , Strain Gauge, RTD (Resistance Temperature Detector), Resistance Hygrometer, Thermistor, Piezoelectric Transducer, etc. 2. Active Transducer: Generation of voltage/current E.g. Thermocouple, Piezoelectric Transducer, Photo-volatile Cell, Tachogenerator 3. Analog Transducer E.g., Strain Gauge, LVDT, Thermocouple, Thermistor 4. Digital Transducer E.g., Tu rbine meter used in for flow measurement 5. Transducer (converts a non-electrical quantity into an electrical quantity) Eg. LVDT (mechanical displacement to electrical), Thermocouple (Temp to voltage) 6. Inverse Transducer (an electrical quantity into a non-electrical quantity) E.g., Piezoelectric crystals 7. Primary and secondary Transducer E.g. For pressure measurement, a bourden tube is used, which is used to convert pressure to displacement. After, LVDT ...
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