First be sure that your choice meets your weighing requirements.  Factors such as range, readability (resolution), accuracy (linearity), and repeatability are prime considerations.  However, because of the large number of scale offerings, these factors may be found to be identical in many competitive models.  But at least you have a group of qualified scales, based upon their metrology, to select from.

One of the next most important things to consider is the indicator (display).  The reading of the display is often done at a far greater distance and viewing angle with an industrial scale, as compared to a lab scale.   There are a number of different types of displays, and they each offer different advantages and disadvantages.  For instance, if your application has one person loading and unloading the scale and a different person recording the results, you may want a remote indicator.  Platform scales have the indicator mounted on a column or remotely.  Bench scales have the display built into the scale body (like a lab scale).  Crane scales often offer both the built in display and a remote hand held display.  The hand held becomes very important when the scale moves off with the load and is hard to see.

Another important consideration is the size and material of the weigh pan.  The size is important if the scale is going to weigh packages, especially if all that is specified is “the larger the better”.  Most people seem to opt for stainless steel pans for ease of cleaning and durability under adverse conditions (which is often the proper description for industrial scale operating environments).

Still another important consideration is the applications offered with the scale (the scale software).  If your scale will be used for parts counting at times, then be sure that parts counting software comes with the scale, otherwise you will have to export your readings to an external software package.  The same is true for Percent Weighing, Dynamic (Animal) weighing, Totalizing, Check Weighing (production control), and others.  Having the function you need included in the scale, like Check Weighing (High-Go-Low indications), can save both time and money, and simplify your operations.

Another consideration is does the scale weigh in the units you want it to, or will you have to do a separate conversion, like pounds to grams or newtons.  Also consider if the scale sends data out in a simple format.  Look for an easy system for leveling the scale based upon a built in leveling indicator. Consider the overload capability of the scale. Will it survive a coffee spill?  

Hopefully, all of this has led to an obvious choice, or at least significantly narrowed the field.