Basic difference is that:
Sensor is a device that measures or senses a physical quantity and converts it into another analogue quantity that can be measured electrically such as voltage, ohmic resistance, inductance or capacitance. Because, transducers are sometimes found in sensors.The main difference between sensor and transducer is, the sensor is a physical device, that senses a physical quantity and then converts it into signals which can be read by an instrument or the user. A key difference between transducer and sensor. Description of the oscillator The function of the Oscillator is to provide an accurate sine wave voltage to drive the transducer, stable in both amplitude and frequency. The main difference between sensor and transducer is that a transducer is a device that can convert energy from one form to another, whereas a sensor is a device that can detect a physical quantity and convert the data into an electrical signal. A good example of a transducer is an antenna, which can be used to convert electricity to electromagnetic waves and vice versa. Accuracy: It is the degree of exactness between actual measurement and true value. These two sensors sit beside each other, and when the signal differential between the two sensors changes (if a person enters the room, for example), the sensor will engage. The change in resistance is measured by the ac or dc measuring devices.The resistive transducer is used for measuring the physical quantities like temperature, displacement, vibration etc. Pressure sensors can be described with a 4-20mA output signal and pressure transducers with a millivolt signal. Our company, MaxBotix Inc., manufactures ultrasonic sensors that are currently used as proximity sensors, level sensors, distance sensors, and more. However, this can reduce sensitivity and increase hysteresis. Chapter5_ Sensor & Transducer. 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