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Measurement

Objective:

Answer a question

Test Plan

Easy to interpret data

General Measurement System

Assigning Specific Value to a Physical Variable

Transducer

Human beings can feel it (roughness, length, sound. color, smell) but cannot sense variables

Sensor

Sesor is a physical element that employs some natural phenomenon to sense the variable being measured

A transducer converts the sensed information into ta detectable signal

The signal can be mechanical, electrical, optical, or any form that can be meaningfully recorded