COMPONENTS 1 - LEVEL SENSOR

Table showing the comparison between Ultrasonic Sensor and Infrared Sensor.

Ultrasonic Sensor	Infrared Sensor
Advantages
The output value is linear with the distance between the sensor and the target.	Infrared sensors can detect infrared light over a large area.
Sensor response is not dependent on the colors, transparency of objects, optical reflection properties, or by the surface texture of the object.
Sensors are designed for contact-free detection.	IR sensor uses non-visible light for detection.
Accurate detection even of small objects.
Able to operate in critical conditions such as dirt and dust.	Cheap in price.
Disadvantages
Ultrasonic sensors must view a high density surface for good results. A soft surface like foam and cloth has low density and absorb the sound waves emitted by the sensor.	This sensor is very sensitive to IR lights and sunlight
Could have false responds for some loud noises such as air hoses	it has a weakness to darker colors such as black
Changes in the environment can affect the response of the sensor (temperature, humidity, pressure, etc.).

The sensor that will be use is Ultrasonic Ranging Sensor (HC SR04). Physically, this sensor has two pins: Trigger and Echo, which used for calculating the distance of the object by generating sound waves and thus calculating the time duration of the echo that generated. This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Therefore, this sensor is the most suitable sensor to be used in the prototype development.