List non contact type transducer and compare them on the basis of any two factors.

List non contact type transducer and compare them on the basis of any two factors.
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1 Answer

Answer :

Magnetic pick-up
Photoelectric
This tachometer generator consists of a metallic tooth rotor mounted on the shaft whose speed is to be measured.
This method of measuring speed of rotation consists of mounting an opaque disc on the rotating shaft.
A magnetic pick-up is placed near the toothed rotor. The magnetic pick-up consists of a housing containing a small permanent magnet with a coil wound round it.
The disc has a number of equidistant holes on its periphery. At one side of the disc a light source is fixed like LED and on other side of the disc, and on the line of the light source, a light sensor like phototube or some photosensitive semi conducting device is placed.
Since the number of teeth is known the speed of rotation can be determined by measuring the frequency of pulses with an electronic counter.
N = f/HN Since the number of holes on the disc is fixed, the speed is a function of pulse rate.
A typical rotor has 60 teeth thus if the counter counts the pulses in one second, the counter will directly display the speed in rpm.
The pulse rate can be measured by an electronic counter which can be directly calibrated in terms of speed in rpm.
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Related questions

Draw and explain in brief speed measurement using non-contact type transducer.

Description : Draw and explain in brief speed measurement using non-contact type transducer. 

Last Answer :  i) Photoelectric Tachometer:  This method of measuring speed consists of mounting an opaque disc on the rotating shaft. The disc has a number of equidistant holes on its periphery. At one side of the disc a light source is ... (pulses per second /number of teeth)  = (P/T) rps = (P/T) *60 rpm.

Compare primary and secondary transducer (any two points).

Description : Compare primary and secondary transducer (any two points).

Last Answer : i) Primary Transducer: The detector or sensing element which senses the physical phenomenon and converts it into a measurable quantity, whose output forms the input of another transducer is ... analogous output of primary transducer into an electrical quantity is called a secondary transducer.

Compare active and passive transducer.

Description : Compare active and passive transducer.

Last Answer : Active Transducer Passive transducer Don't require external power for operation. Require external power supply for operation. It is also called selfgenerating transducer. It ... energy controlling Principle. Ex-Thermocouple, piezoelectric. Ex Thermistor, Strain Gauges.

Compare contact type and non-contact type speed measurement method.

Description : Compare contact type and non-contact type speed measurement method.

Last Answer : Contact type method Non contact type method Physical contact between meter and shaft  No Physical contact between meterand shaft Consists of moving parts Does not consist of moving parts ... is less  Ex.AC / DC tachometer Ex. Rotary Encoder, Photo electric tachometer

State the use of RADAR type level transducer & list two advantages.

Description : State the use of RADAR type level transducer & list two advantages.

Last Answer : Applications of radar type transducer: i) RADAR type level transducer is suitable for large tanks with range upto 200m for level measurement. ii) It is used for continuous level measurement. ... iii) Not affected by corrosive materials. iv) Can be used for hard to handle' applications.

Compare active transducer with passive transducer based on working principle, example, advantage, application

Description : Compare active transducer with passive transducer based on working principle, example, advantage, application

Last Answer : Compare active transducer with passive transducer based on working principle, example, advantage, application

Which of the following is not the basis for subclassifying β adrenergic receptors into β1 and β2 : A. Selectivity of agonists B. Selectivity of antagonists C. Transducer pathway of response effectuation D. Organ selective location

Description : Which of the following is not the basis for subclassifying β adrenergic receptors into β1 and β2 : A. Selectivity of agonists B. Selectivity of antagonists C. Transducer pathway of response effectuation D. Organ selective location

Last Answer : C. Transducer pathway of response effectuation

Which of the following is not the basis for subclassifying β adrenergic receptors into β 1 and β 2: A. Selectivity of agonists B. Selectivity of antagonists C. Transducer pathway of response effectuation D. Organ selective location

Description : Which of the following is not the basis for subclassifying β adrenergic receptors into β 1 and β 2: A. Selectivity of agonists B. Selectivity of antagonists C. Transducer pathway of response effectuation D. Organ selective location

Last Answer : C. Transducer pathway of response effectuation

List any two materials for Piezoelectric transducer.

Description : List any two materials for Piezoelectric transducer.

Last Answer : i) Quartz crystal, ii) Barium titanete , iii) Rochelle salt , iv) Lithium Sulphate, v) Potassium Dihydrogen phosphate.

List two advantages and disadvantages of photoelectric pickup transducer.

Description : List two advantages and disadvantages of photoelectric pickup transducer.

Last Answer : Advantages : 1. No direct physical contact of the meter with rotating shaft whose speed to be measured. Hence no additional load on the shaft. 2. Output is in digital format. 3. No A/D converted ... (typically 50,000 hours.) 2. The accuracy of meter depends on the error represented by one pulse.

List any six criteria for selecting a proper transducer for an application.

Description : List any six criteria for selecting a proper transducer for an application.

Last Answer : Criteria for selecting a transducer for an application: 1. Electrical output of transducer (Current/voltage) 2. Range of measurement i.e maximum and minimum values of parameter to be measured. ... . 11. Loading effect. 12. Stability & Reliability of transducer 13. Cost and availability

List four electric pressure transducer.

Description : List four electric pressure transducer.

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Give classification of transducer on any two factors

Description : Give classification of transducer on any two factors

Last Answer : The transducers can be classified as: - 1. Active and passive transducers. 2. Analog and digital transducers. 3. On the basis of transduction principle used. 4. Primary and secondary transducer 5. Transducers and inverse transducers

Define transducer. State factors which are considered while selecting transducer for a particular application.

Description : Define transducer. State factors which are considered while selecting transducer for a particular application.

Last Answer : Transducer - It converts one form of signal into another form. A transducer is a device that is used to convert a physical quantity into its corresponding electrical signal. ... compatibility : The transducer should maintain input and output characteristic for the selected environmental condition.

Classify transducer. Write one sentence about each of them.

Description : Classify transducer. Write one sentence about each of them.

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Write example of each type (i) Primary transducer (ii) Active transducer (iii) Electrical transducer (iv) Digital transducer

Description : Write example of each type (i) Primary transducer (ii) Active transducer (iii) Electrical transducer (iv) Digital transducer

Last Answer : (i) Active transducer:-Thermocouple, piezoelectric, photovoltaic cell (ii) Primary transducer:- Bourdon tube, bellows, (iii) Electrical transducer.:- LVDT,RVDT, Hall effect, strain gauge, ... , optical pyrometer, radiation pyrometer (iv) Digital transducer:- Linear Encoder, digital taco generator

List any two specifications of electrical pressure transducer.

Description : List any two specifications of electrical pressure transducer.

Last Answer : Specifications of electrical pressure transducer: - 1. Root Sum Squares (RSS) 2. Non-Linearity 3. Hysteresis 4. Non-Repeatability 5. Long-Term Stability 6. Zero Offset 7. Span ... Size 10. associated circuit 11. sensitivity 12. self-generated or external power source 13. Miscellaneous

List any four types of transducer.

Description : List any four types of transducer.

Last Answer : Types of Transducer based on Quantity to be Measured Temperature transducers Pressure transducers Displacement transducers Flow transducers Types of Transducer based on the Principle of ... Whether an External Power Source is required or not Active Transducer Passive Transducer

Compare RTD and thermistor on the basis of temperature coefficient , linearity, temperature range and cost.

Description : Compare RTD and thermistor on the basis of temperature coefficient , linearity, temperature range and cost.

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Compare CC and PC of wattmeter on the basis of:- (i) Connection (ii) Status (iii) Number of turns (iv) Gauge of wire.

Description : Compare CC and PC of wattmeter on the basis of:- (i) Connection (ii) Status (iii) Number of turns (iv) Gauge of wire.

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Compare between BJT and FET on the basis of (i) Biolar/Unipolar (ii) Tharmal Runaway (iii) Noise (iv) Applications

Description : Compare between BJT and FET on the basis of (i) Biolar/Unipolar (ii) Tharmal Runaway (iii) Noise (iv) Applications

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Compare BJT common base configuration with common collector configuration on the basis of (i) Current gain (ii) Voltage gain (iii) Input impedance (iv) Output impedance

Description : Compare BJT common base configuration with common collector configuration on the basis of (i) Current gain (ii) Voltage gain (iii) Input impedance (iv) Output impedance

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State two examples of active transducer.

Description : State two examples of active transducer.

Last Answer : Examples of active transducer: 1. Thermocouple 2. photovoltaic cells (solar cells) 3. Piezoelectric crystals. 4. Thermoelectric 5. Magnetostrictive 6. Electrokinetic

State two examples of passive transducer.

Description : State two examples of passive transducer.

Last Answer : Examples of passive transducer: 1. LDR 2. Thermistor 3. Strain Gauge 4. Resistive transducers. 5. Inductive transducers. 6. Photoconductive 7. Capacitive transducers. 8. Magnetoresistive 9. Thermoresistive 10. Electroresistive 11. RTD

Define transducer. Give two examples.

Description : Define transducer. Give two examples.

Last Answer : Transducer - It converts one form of signal into another form. A transducer is a device that is used to convert a physical quantity into its corresponding electrical signal.  Classification - 1. Active transducer 2. Passive transducer 

State principle of operation of piezo-electric transducer. State its application.

Description : State principle of operation of piezo-electric transducer. State its application.

Last Answer : The piezoelectric element used for converting mechanical movement into electric signals. The mechanical deformation generates charges and this charge appears as a voltage across the electrodes.  ... destructive test (NDT) equipments 6. Piezoelectric materials are used in ultrasonic transducers. 

Explain how AC current is measured using hall effect transducer.

Description : Explain how AC current is measured using hall effect transducer. 

Last Answer : This type of sensor works on a simple electromagnetic principle.  In above diagram of the Hall effect. A current is conducted through a thin piece of foil from terminal I and ground. ... called the Hall-effect voltage is produced at the terminals attached to the opposite sides of the foil.

Discuss any 4 points to be considered while selecting a transducer for its intended applications.

Description : Discuss any 4 points to be considered while selecting a transducer for its intended applications. 

Last Answer : 1. Operating range 2. Operating principle 3. Sensitivity 4. Accuracy 5. Frequency response and resonant frequency 6. Errors 7. Environmental compatibility 8. Usage and ruggedness. 9. ... 10. Stability and Reliability 11. Loading effect 12. Static characteristics 13. General selection criteria

Define the term Transducer and sensor.

Description : Define the term Transducer and sensor.

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Explain in brief AC Current , RMS Indication using Hall Effect Transducer.

Description : Explain in brief AC Current , RMS Indication using Hall Effect Transducer.

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Draw and explain the operation of pressure transducer having diaphragm as a primary sensor and four strain gauges as secondary sensors.

Description : Draw and explain the operation of pressure transducer having diaphragm as a primary sensor and four strain gauges as secondary sensors.

Last Answer : Pressure measurement with strain gauges on diaphragm: Description: This method uses the principle of converting pressure into a displacement by elastic elements which act as primary ... unbalance in the bridge circuit, producing an output voltage proportional to the applied pressure.

State Hall effect. Explain in brief operation of hall effect transducer with its suitable applications.

Description : State Hall effect. Explain in brief operation of hall effect transducer with its suitable applications.

Last Answer : Principle: The principle of working of a Hall Effect Transducer is that if a strip of conducting material carries' a current in the presence of a transverse magnetic field, a difference of ... a transverse magnetic field passes through the strip, an output voltage appears across the output leads.

State selection criteria of transducer.

Description : State selection criteria of transducer.

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Classify transducer in detail.

Description : Classify transducer in detail.

Last Answer : 1. Active and Passive transducers. 2. Analog and digital transducers. 3. Primary and secondary transducers. 4. Electrical and mechanical transducers. 5. Transducers and inverse transducers. 

State the necessity of transducer.

Description : State the necessity of transducer.

Last Answer : Necessity of Transducer: Input quantity for most of the Instrumentation systems is non - electrical quantity. To convert non- electrical quantities like heat, pressure, level, flow rate, ... use electrical methods and techniques for measurement, manipulation and control, transducers are required.

A strain gauge is a passive transducer and is employed for converting

Description : A strain gauge is a passive transducer and is employed for converting   (a) Pressure into change in resistance (b) Force into displacement (c) Mechanical displacement into a change of resistance (d) None of the above 

Last Answer : A

An inverse transducer converts

Description : An inverse transducer converts   (a) electrical energy to any other form of energy (b) electrical energy to light energy (c) mechanical displacement into electrical signal (d) electrical energy to mechanical form  

Last Answer : A

The device in communication satellites which receives signals from an earth station and transmits them to different directions is (1) Transformer (2) Transistor (3) Transponder (4) Transducer

Description : The device in communication satellites which receives signals from an earth station and transmits them to different directions is (1) Transformer (2) Transistor (3) Transponder (4) Transducer

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List any two non-contact type level measurement methods.

Description : List any two non-contact type level measurement methods.

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Compare dry clutch & wet clutch on basis of

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Compare the following fuels on the basis of calorific value and knocking. LPG, CNG and bio-diesel

Description : Compare the following fuels on the basis of calorific value and knocking. LPG, CNG and bio-diesel 

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Compare SI and CI engine on the basis of air-fuel ratio, power output, emission and knocking.

Description : Compare SI and CI engine on the basis of air-fuel ratio, power output, emission and knocking.

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Compare floor inspection and centralized inspection on the basis of (i) Definition. (ii) Measuring instruments used (iii) Suitability. (iv) Mode of inspection.

Description : Compare floor inspection and centralized inspection on the basis of (i) Definition. (ii) Measuring instruments used (iii) Suitability. (iv) Mode of inspection.

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Compare Brazing and Soldering on the basis of : (i) Temperature Used. (ii) Filler Material. (iii) Joint Strength (iv) Applications.

Description : Compare Brazing and Soldering on the basis of : (i) Temperature Used. (ii) Filler Material. (iii) Joint Strength (iv) Applications.

Last Answer : Comparison of Brazing and Soldering:

Compare between simplex and full duplex communication on the basis of: 1) Definition 2) Sketch

Description : Compare between simplex and full duplex communication on the basis of: 1) Definition 2) Sketch

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Compare PAM, PWM, and PPM on the basis of i. Variable characteristics ii. Bandwidth iii. Information contained in iv. Transmitted power

Description : Compare PAM, PWM, and PPM on the basis of i. Variable characteristics ii. Bandwidth iii. Information contained in iv. Transmitted power

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Compare ground wave and space wave propagation on the basis of: (i) Frequency range (ii) Method of propagation.

Description : Compare ground wave and space wave propagation on the basis of: (i) Frequency range (ii) Method of propagation.

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