Download sensor is analog

Sensors are mostly electronic devices used to
monitor or capture something.
For example, an optical sensor to count the number of
items on the treadmill.
A complete system that has a sensor
and produces an electric output signal
is called a transducer.
FEATURES
SUPPLY
The sensors are designed for industrial DC
voltages (usually in the automation they use
24 volts), ac or universal (both)
OUTPUTS
If the electric output signal can be
any value between certain limits, the
sensor is analog. Typically, the
controller receives the signal is digital
and, therefore, uses an AD converter.
If it can be only two values, for example,
120mv and 5v, the sensor will be digital.
APPLICATIONS
Widely used in medicine,
automation, robotics.
Medical Pulse Sensor
TYPES OF SENSORS
Depending on your application there are various
families and types of sensors for use
POSITION
Compared with a reference, determine the
physical location
Potentiometer (resistance)
Ultrasonic (measures time by
acoustic waves)
Encoders (angular motion)
Inductive (capture ferromagnetic
materials by varying
the electromagnetic field)
Capacitive (electrostatic field variation).
OPTICAL
The transmitter sends the light that is captured
by the receiver
TEMPERATURE
The most common and cheapest is the thermocouple.
But it is not accurate for temperatures below 1 ºC
MAGNETIC
Detect magnets through the varying magnetic
field