Material Dispensing Control

An instance when you might encounter weight challenges is when you undertake a journey by air. All airlines have a limit on the weight of baggage you can carry on the flight. In this case, we use weight as a measuring parameter. All weighing scales have a strain gauge or load cell to sense the weight and convert it into an electronic signal for further processing, which can convert it to numbers that humans understand.

In the industry, too, we need to measure the number of materials to deliver to the consumer in the right quantity. The quantity of liquids is usually measured by volume – for example, in milliliters or liters. When materials such as oils (edible oils) and lubricants are filled in containers using volume, accuracy and precision when filling their containers are important to a consumer. The control challenge here is managing the quantity of filled material (in a bottle or can). In such applications, the measurement variable is the...