Week 11

Sensor

Level sensor detects the level of substances that flow, including liquids, slurries, granular materials, and powders. Fluids and fluidized solids flow to become essentially level in their containers (or other physical boundaries) because of gravity whereas most bulk solids pile at an angle of repose to a peak. The substance to be measured can be inside a container or can be in its natural form (e.g., a river or a lake). The level measurement can be either continuous or point values. Continuous level sensors measure level within a specified range and determine the exact amount of substance in a certain place, while point-level sensors only indicate whether the substance is above or below the sensing point. Generally the latter detect levels that are excessively high or low. The sensor that will be used in the prototype is water level sensor.

Figure 3 is the example of installation.

This system are divided into five different levels such as normal zone, level 1, level 2, level 3 and dangerous zone. Level 1 indicates increasing water level but still in safe Zone. Meanwhile, level 2 and level 3 are precaution states whereby the water level keep increasing just nearly dangerous zone. When reach the danger zone the sensor will give a signal to monitoring system.