Transducers and sensors we use both in various appliances and in gadgets. These both are physical devices and we use both in electrical and electronic instruments for measuring the physical quantities. The difference between transducer and sensor can help us to understand the basics better and know their comparisons thoroughly. Let us now understand what is the difference between transducer and sensor.
What is a transducer?
A device that changes the physical attributes of the non-electrical signal into an electrical signal, which is easily measurable is termed as a transducer.
What is the sensor?
A device useful to measure a physical quality and give the output in an easy to read format for the user is a sensor.
Difference between Transducer and sensor
The important difference between transducer and sensor.
|Definition||It is designed to sense any physical change occurring in the surrounding. Sensors are responsible for converting the transition into a precise quantity.||A transducer actuates to transform energy from a given form to another.|
|Component||The sensor has no other component except itself.||The transducer has 2 parts signal conditioning and sensor|
|Functionality||The sensor detects changes and generates corresponding electrical signals.||They are responsible for converting energy into a different form.|
|Applications||A magnetic sensor, Accelerometer sensor, Proximity sensor, Light sensor, etc. are some applications||Thermistor, Thermocouple, Potentiometer, etc. are some applications|
|Dependency||A sensor may not be a transducer.||A transducer will always contain a sensor.|
|Complexity of performance||Performance of a sensor is less complicated||Performance of the transducer is more complicated because it is designed to transform the physical quantity|
|Feedback||It only measures a physical quantity and cannot give input to the desired system on its own.||A transducer can convert between any forms of energy, they can be used to provide feedback to the system.|
After learning about the difference between transducer and sensor, it is important to know the details of the transducer and sensor thoroughly.
The transducer converts the physical quantity or nonelectrical quantity into another signal or electrical signal. The transducer consists of three major components, they are the input device, signal conditioning or processing device, and an output device. The sensor, signals conditioning circuits, present in the transducer finds application in communication systems to convert the electricity to electromagnetic waves.
The process of energy conversion in the transducer is termed as the transduction. The transduction completes into two steps. The first step is by sensing the signal and then strengthening it for further processing. The input devices present in it receive the measured quantity and transfer the proportional analog signal to the conditioning device. After that, the conditioning device modified, filtered, or attenuates the signal which is easily acceptable by the output devices.
There are two types of transducer Mechanical and electrical transducer. Transducers that convert physical quantities into mechanical quantities are termed as mechanical transducers; transducers that convert physical quantities into electrical quantities are termed as electrical transducers.
The sensor is a device that measures the physical quantity such as temperature, light, sound, etc. into an easily readable signal (voltage, current, etc.). It gives accurate readings after calibration.
We use sensors in the different electronics equipment for sensing physical quantity. The few of them are the motion sensors, which we use in the home security system and the automation door system. We use photosensor, which senses the infrared or ultraviolet light. We use the accelerometer sensor in the mobile for detecting the screen rotations.
Sensors, which produce a continuous output signal, or voltage, which is generally proportional to the quantity being measured is termed as analog sensors. Physical quantities such as Temperature, Speed, Pressure, etc are all analog quantities, as they tend to be continuous in nature. Sensors, which produce binary output signals or voltages that are a digital representation of the quantity being measured is termed as digital sensors.
FAQs about Transducer and sensor
Q1. How does the inductive proximity sensor work?
Answer: We use it to detect the presence of metallic objects without actually contacting the object. They are in use in automation applications due to their high-speed switching and small size. It consists of an oscillator driven coil, which creates an electromagnetic field, which appears at the active face of the sensor. If a metal target enters this area, the electromagnetic field reduces. Therefore the sensor switch turns on or off. Some of the applications of inducing sensors are sensing the presence of metallic parts such as screws and measuring the rotational speed of axial detecting cams.
Q2. What is an inductance transducer?
Answer: Transducers on the basis of the variation of inductance are another group of important devices useful in much application. In these transducers, self-inductance or the mutual of a couple of coils is modified when the quantity to be measured is varied.