Analog sensors create analog signals from the quantity that is sensed. In comparison, digital sensors produce digital signals when performing a measurement. As mentioned previously, the most common types of analog sensors include sound sensors, light sensors, temperature sensors, and pressure sensors. Analog Sensors measure the external parameters and give an analog voltage as an output. They produce a continuous output signal or voltage which is proportional to the quantity being measured. The output voltage may be from the range of 0 to 5V. Low logic 0 (0V-3.5V) and High logic (3.5V-5V).
Inductive linear analog sensors work on the same principle as inductive proximity sensors, but produce an analog output. Inductive sensors contain an oscillator that creates a high-frequency electromagnetic field that radiates from a coil wrapped around a ferrite core in the front of the sensor. The analog sensors give a continuous output signal proportional to the measurement. In general, analog sensors come in various shapes and sizes; practical examples include accelerometers, pressure sensors, light sensors, sound sensors, temperature sensors, and so on.
These technologies are used to convert, condition and process real-world phenomena, such as light, sound, temperature, motion, and pressure into electrical signals. Analog signals are continuous electrical signals that represent the measurement variable. The analog signal could be based on either voltage or current. The signal is scaled based on the range of the measured variable. A possible analogy for an analog signal could be something like a dimmer control for a light bulb.
