"Primary transducers: The transducer which sends the measurement and converts them into another
variables (like displacement, strain etc.) and whose output forms the input of another transducer is called as primary transducer.
Secondary transducer: The transducer which converts the output of first transducer into an electrical output called secondary transducer
<a href=http://en.docsity.com/en-docs/Elect_inst2_>Measuring System</a>
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