Counting scales are used wherever accurate counting is required, many scales have this function available based on the operator placing a small sample on the weigh pan (5,10,etc) then confirming the quantity, the scale computes the average piece weight (APW) and display the count additional items are then added to meet the packing requirements. We recommend testing components before buying off internet, we stock a range of machines that can be tested or hired prior to purchase to ensure you get the correct model.
Differences between internal resolution and displayed resolution
Internal resolution and displayed resolution are often used when describing counting scales, have very different meanings:
Displayed Resolution is the smallest
change in the results detected in the measured sample by the weighing
instrument, and is the division size
For example, if you’re using a scale that only has a readability of
0.1g, it will not show you the weight of something that weighs 0.054g.
Display resolution is actually the ratio of capacity to readability - often present in a number of basic balances.
Internal Resolution is the number the
scale’s capacity can be divided into or another way to think of it as a basic or a scientific calculator . and almost never the same as the display resolution referered to as the "minimum piece weight" i.e. the smallest component it can discriminate against.
From the above manufacturers have designed special "Counting scales" which combine both resolutions to provide the best performance and repeatability for your products, they also can have a feature called "automatic APW re calculation" in the scales, this is very useful where plastic parts or components that have a variable piece weight typically used to determine APW's for storage / recall purposes.