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There are various types of sensors and transducers are available to choose from like analog, digital, input and output. • You will notice that many are electrical in nature and in fact this conversion into electrical energy is common in both the measurement of electrical Question2: Type of sensor used to detect both metallic and non-metallic objects. These transducers are also called as pressure indicators, ma… T… For sensing temperature, the sensors are thermistor, thermocouple, resistance temperature detectors and thermostat. There are a variety of transducer types like pressure transducer, piezoelectric transducer, ultrasonic transducer, temperature transducer, and so on. a) True. • Sensor (e.g., thermometer) - … But, a sensor and transducer can be defined as they converts one physical quantity to another. The primary function of the sensor is to sense the physical changes, whereas the transducer converts the physical quantities into an electrical signal. b) False. The actuators are heaters. a) Capacitive sensor. Answer: A. Sensors and Transducers - generally classified into two types based on its power requirement: passive and active. 3. Question1: Sensor is a type of transducer. The sensor senses the physical change across the surrounding whereas the transducer transforms the one form of energy into another. Definitions: Transducer and sensors • Transducer – a device that converts a primary form of energy in to a corresponding signal with a different energy form Primary Energy Forms: mechanical, thermal, electromagnetic, optical, chemical, etc. 4. b) Inductive sensor. The following are the key differences between the sensor and transducer. XI Questions Related to Types of Sensors. • The final column shows what form the output takes. Let us discuss the use of different types of transducers in practical applications. Explanation: Sensor is a device which enables measurement of input value. For sensing light, the input devices or sensors are photo diode, photo transistor, light dependent resistor and solar cells. PRINCIPLES OF SENSORS & TRANSDUCERS • The previous table shows some examples of the types of sensor used in engineering systems. Pressure transducer is a special kind of sensor that alters the pressure forced into electrical signals. The output devices or actuators are LEDs, displays, lamps and fiber optics. The sensor itself is the major component of the sensor, whereas the sensor and the signal conditioning are the major elements of the sensor. Sensors/Transducers. 3. Some of the most commonly used sensors and transducers for different stimuli (the quantity to be measured) are 1. In active sensors, Not all transducers are sensors but most sensors are transducers. Some transducer types like active transducer and passive transducers are based on whether a power source is required or not. 2. The type of i/p or o/p transducer being used, really depends upon the kind of signal sensed or controlled. For sensing position, the input devices are pote… 1. Figure16. For example a thermistor is a type of sensor; it will respond to the change in temperature but does not convert the energy into a different format to what it was originally sensed in. 2.

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