Transducer and Types

Define transducer

• is a device that measure the difference in pressure between the two pressure ports

• is a device that converts one form of energy to other form

• is the ratio of the output of the transmitter to the input signal

Which below correctly define the type of transducer

• Analog transducer : sense of non electrical variables, ex: limit switch

• Discrete transducer : sense of electrical & non electrical variables: ex: thermocouple

• Active transducer : do not need external power

Which criteria below NOT IMPORTANT to be considered when selecting transducers:

• Sensitivity of transducer

• Weight of transducer

• Colour of transducer

• Environmental compatibility

Which below include in Temperature transducer:

• Thermocouple

• Ultrasonic

• Potentiometer

• Strain Gauge

Define thermocouple as a temperature transducer?

• When two wires with similar electrical properties are joined at both ends and one junction is made hot and the other cold, a small electric current is produced proportional to the difference of the temperature

• When two wires with similar electrical properties are joined at both ends and one junction is made hot and the other cold, a small electric current is produced proportional to the difference of the pressure

• When two wires with dissimilar electrical properties are joined at both ends and one junction is made hot and the other cold, a small electric current is produced proportional to the difference of the temperature

• When two wires with dissimilar electrical properties are joined at both ends and one junction is made hot and the other cold, a small electric current is produced proportional to the difference of the pressure

Which below advantages of thermocouple :

• Self powered

• Inexpensive

• Rugged

• All answers stated above

Stress is defined as _________

• Diameter per unit area

• Length per unit area

• Weight per unit area

• Force per unit area

Load cell is used for the measurement of _______

• Area

• Force

• Mass

• Length

LVDT has

• one primary coil and two secondary coils

• one primary coil and one secondary coil

LVDT stands for:

• Linear Variable Differential Transformer

• Linear Variable Differential Transducer

• Linear Variable Difference Transducer

• Linear Variable Difference Transformer