It has rugged construction. Some of the major disadvantages of resistive transducers are: A lot of power is wasted in moving the sliding contacts. Low sensitivity. The measurement of the physical quantity is quite difficult. Disadvantages of Electrical Transducers . 1) Potentiometer. The following is an example of a resistive transducer which measures the displacement of an object . 1. When there is a change in temperature, the temperature coefficient of the resistive transducer changes which can be used to determine the change in temperature. Disadvantages of Strain Gauge : (i) It is non-linear (ii) It is very sensitive to temperature. The sliding contacts are placed on the resistive element. Following are the drawbacks or disadvantages of Resistive Touch Screen: It is not much sensitive and requires one to press harder. It is not suitable for measurement in static condition 2. It … Disadvantages of Potentiometer The major disadvantage is that it requires a large force to move their sliding contacts i.e. Here, the resistance change can be calculated with the help of measuring devices like AC or DC. Other piezoresistive devices. It measures temperature, pressure, displacement, force, vibrations, etc. Rugged. These can give high performance in the industrial environment also. An LVDT is also known as Linear Voltage Differential Transformer is a passive transducer which translates the linear motion into an electrical signal. For a strain gauge cancelling can be achieved by using a full bridge. Transducers Types of transducers (Active and Passive) Resistive Transducers Definition Working Principle Types Advantages and disadvantages Applications Capacitive transducers Definition Working principle Types Advantages and disadvantages Applications. Disadvantages of an Electrical transducer: The electrical transducer is sometimes less reliable than mechanical type because of the ageing and drift of the active components. So metallic parts of transducers must be insulated from each other. 9AEI306.77 27 Resistive type of level Indicator • This is an electrical method where the liquid level position is converted into an electrical signal 28. sawakkincsem sawakkincsem Strain gauge: It is a device used to measure the Strain or deformation of an object. Difference Between Transducer & Inverse Transducer, Two Wattmeter Method of Power Measurement, Difference Between Conduction and Convection, Difference Between Circuit Switching and Packet Switching, Difference Between Static and Kinetic Friction, Difference Between Ductility and Malleability, Difference Between Physical and Chemical Change, Difference Between Alpha, Beta and Gamma Particles, Difference Between Electrolytes and Nonelectrolytes, Difference Between Electromagnetic Wave and Matter Wave. Vibration sensitive. A resistive transducer is mainly used to measure the temperature in various kinds of applications. Temperature sensitive. strain gauges biggest disadvantage is that they are non-linear. Fast response. This will affect the performance. Difference Between Von Neumann and Harvard Architecture? Capacitive Transducers, capacitance,Construction, working, advantages,displacement transducer application. Capable of DC response. AC response only. Fast response It has good frequency response. Transducers responding to more than one phenomenon is a common problem and either needs to be compensated for or cancelled out. The resistive transducer can work both as the primary as well as the secondary transducer. 52) A temperature-sensitive transducer is subjected to a sudden temperature change. Your email address will not be published. The variation of resistance R with temperature t can be represented by the equation, Where α is the temperature co-efficient at t 0 and R 0 is the resistance at t 0. The resistive transducers are available in various sizes and they have a considerably high amount of resistance. Piezoresistors have the disadvantage of being highly sensitive to temperature changes while featuring comparatively small relative stress dependent signal amplitude changes. The slider moves horizontally. The capacitive transducer is useful for small system. Strain Gauge. Required fields are marked *. It modifies the inductance of the circuitas well as the equivalent output. Example – The circuit of the sliding resistive transducer is shown in the figure below. The variable resistance transducers are also called as resistive transducers or resistive sensors. Transducers Transducer is an electronic device that … Resistive & Capacitive Transducers Presented To: Presented By: Overviews. The transduction element of capacitive transducer is a capacitor which may be a parallel plate, cylindrical or angular capacitor. Both the AC and DC, current or voltage is appropriate for the measurement of variable resistance. Resistive type of level Indicator 27. It is small in size. The sensitivity of capacitive transducer is high. It is available in various sizes and having a high range of resistance. 2) A great amount of power is required to move the sliding contacts . It is affected by temperatures 3. The primary transducer changes the physical quantities into a mechanical signal, and secondary transducer directly transforms it into an electrical signal. Passive Type Transducers. Wide temperature range. It is a passive transducer which required external source of supply to function. Definition: The transducer whose resistance varies because of the environmental effects such type of transducer is known as the resistive transducer. Following are the disadvantages of Capacitive sensor: It is very much sensitive to changes in environmental conditions such as temperature, humidity etc. Also the sensing elements and the associated signal processing circuitry are comparatively expensive. This characteristic can be used in the measurement of displacement, force, and pressure. The process of variation in resistance is widely used in the industrial applications. The resistive transducer can be used to give very quick results. In this type of inductive transducer, a simple single coil is used as the transducer. Electrical transducer is almost a must in this modem world. Disadvantages of Capacitor Transducers 1. The main purpose of this transducer is to measure physical quantities such as vibration, displacement, temperature, etc. It has good frequency response. Apart from the merits described above, some disadvantages do exist in electrical sensors. An increase or decrease in temperature to a high level will change the accuracy of the device. The inductive transducers can work in any environmental conditions like humidity and high temperatures. Disadvantages: There are some disadvantages of capacitive transducer which are given below, The output impedance depends upon the frequency used. The resistive transducer converts the physical quantities into variable resistance which is easily measured by the meters. a. Small size. Advantages. The resistive transducer is designed by considering the variation of the length, area and resistivity of the metal. The resistive transducer gives the fast response. Disadvantages: There are some disadvantages of piezoelectric transducer which are given below, The piezoelectric transducer is used for dynamic measurement only. Working of Resistive Transducer: The most commonly used type of transducer is variable resistance transducer. Large size. The resistive transducer element works on the principle that the resistance of the element is directly proportional to the length of the conductor and inversely proportional to the area of the conductor. W can use this transducer in various applications even when they are not a necessity. Disadvantages. Time constant t= 10/5 =2s. It needs regular caliberation in order to use perfectly and take perfect reading. Featuring comparatively small relative stress dependent signal amplitude changes this characteristic can be defined as ; resistance. 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