There
are many different types
of sensors
and transducers, but in general, all of them can be classified into
two basic types: analog and digital. So which one is more useful to
your needs? Find out below.
Analog
sensors
Analog
sensors create continuous and generally proportional output signal to
that of the quantity being measured. Physical quantities such as
Strain, Temperature, Pressure, Displacement and Strain, among others,
are all analog because of their continuous characteristic. Analog
sensors share this continuous nature, producing signals that change
smoothly over time.
Digital
sensors
Digital
sensors produce distinct digital output signals that represent the
digital form of the quantity being measured. This type of sensor
generates a binary output signal in the form of 1s and 0s. This means
that the digital sensor only produces, distinct, non-continuous
values which may be outputted as a single serial transmission (bit)
or parallel transmission (byte).
Compared
to analog, sensors of the digital variety score high in accuracy and
can measure and sample signals at a much faster rate—usually
millions of times faster than analog signals. To be able to produce
electrical signals that can be used and measured, analog sensors
require additional amplification or filtering of the signal and an
external power supply.
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