Page 85 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

Range : The transducer can give good result within its specified range, so select transducer as per the operating
range.
Sensitivity : The transducer should be more sensitive to produce the output or sensitivity should be as per
requirement.
Environmental compatibility : The transducer should maintain input and output characteristic for the selected
environmental condition.
Loading effect: The transducer’s input impedance should be high and output impedance should be low to avoid
loading effect.
Errors : The error produced by the transducer should be low as possible

Transducer Characteristics
The characteristics of the transducer are given below that are determined by examining the output response of
a transducer to a variety of input signals. The method of computational and standard statistical can be applied to
the test data.
1 Accuracy: It is defined as the closeness which the reading approaches an accepted standard value or ideal
value or true value, of the variable being measured.
2 Noise: All transducers have some random noise in their output. So the small signals are largely affected by
noise in comparison to larger signals.
3 Linearity: The output of the transducer should be linearity proportional to the input quantity under measurement.
It should have linear input-output characteristics.
4 Sensitivity: The electrical transducer is defined as the electrical output obtained per unit in the physical
parameter of the input quantity called sensitivity of the transducer.
5 Hysteresis: This property wherein a transducer output is dependent not only on the present input but also on
the previous inputs.
6 Size: The transducer should have the smallest possible size and shape with minimal weight and volume. This
will make the measurement system very compact.
7 Repeatability: A transducer ability to produce identical output upon stimulation by the same input in termed
as repeatability.
8 Speed: It is rapidity with which the transducer responds to changes in the measured quantity. The speed of
the response of the transducer should be as high as practicable.
9 Ruggedness: The transducer should be mechanically rugged to withstand overloads. it should have overload
protection.
10 High output: The Transducer should give reasonably high output signal so that it can be easily processed
and measured. The output must be much larger than noise. Nowadays digital output is preferred in many
applications.
11 Dynamic range: For a transducer, the operating range should be wide so that it can be used over a wide
range of measurement conditions.
Sensor & IOT
A sensor is a device that detects the change in the environment and responds to some output on the other
system. A sensor converts a physical phenomenon into a measurable analog voltage (or sometimes a digital
signal) converted into a human-readable display or transmitted for reading or further processing.

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CITS : E & H - Electronics Mechanic - Lesson 43 - 47