For a long time, quality control for blow moulded containers included cutting them up with utility blades so as to make thickness estimation with calipers. There are various issues with this customary technique for testing. At the point when a section is cut open, an uneven surface is left at the cut edge. In the event that the operator makes an estimation over this uneven surface, it would not be a precise assessment. Accepting that the operator is watchful while conducting the test, there are still confinements concerning the precision of test data.


Frequently, the part's geometry won't allow access to sharp corners or handle zones on bottles. Once a section is cut out for thickness estimations, it can't be utilized for other testing procedures. Variety in user way of procedure can also be an issue. Calipers can cause blunders when they are held at an edge to the part, and when calipers are utilized on materials that can be compacted by jaw weight, thickness readings will differ starting with one user then onto the next. There is a potential security issue also.

 Operators are required to segment parts with utility blades a few times, which makes a steady possibility of generating errors in the results and damaging the product as well. An electronic strategy which can lessen or dispense with these issues are Hall Effect gaging. This strategy is presently ordinarily utilized as a part of blow moulding quality control. It utilizes a principle known as the Hall Effect. The Hall Effect utilizes a magnetic field connected at right points to a conductor conveying a current. This mix incorporates a voltage toward another path. Resulting into measuring the in between thickness.