transducer and sensor

A transducer (transduces) (converts) a physically noticeable material, event or appearance into a workable output. like voltage (analog or digital), current or pressure difference related to the measured quantity.

(think of QUANTIFICATION)

A sensor does the same, but quantification is no must.

Example: a moisture sensor tells you there is moisture, a transducer will give you a signal out of which you can define - how much.

For some examples the gap between these has become "grey zone".

so that frequently, one is named like the other.

Transducers in process engineering have one thing in common: expensive price.

This is mostly a matter of local custom. The term "transducer" highlights the idea that one physical parameter (pressure, temperature, flow, etc.) is converted into another (voltage, current, electrical resistance, etc.) The term "transmitter" or "sender" focuses on the idea of transferring a signal from the sensor (in contact with the item to be measured) to a display or control device (meter, gauge, microprocessor, etc.) Of all these terms, "sensor" is perhaps the most generic. There may be stylistic preferences, but these words are basically synonymous.

transducer sends

sensor receives